Proportions and Reasonableness in Real-Life Scenarios

A recipe calls for 2 cups of flour for every 3 cups of sugar. If you want to use 6 cups of sugar, how many cups of flour do you need? Check your answer for reasonableness.

• 3 cups of flour

• 4 cups of flour

• 2 cups of flour

• 6 cups of flour

A car travels 150 miles on 5 gallons of gas. How many miles can it travel on 8 gallons of gas? Use cross-multiplication to find your answer.

• 300 miles

• 180 miles

• 200 miles

• 240 miles

Tags

CCSS.7.RP.A.3

In a class, the ratio of boys to girls is 4:5. If there are 20 boys, how many girls are there? Verify your answer is reasonable.

• 20

• 25

• 30

• 15

A map shows that 2 inches represent 50 miles. How many miles does 5 inches represent? Apply cross-multiplication to solve.

• 100 miles

• 150 miles

• 75 miles

• 125 miles

Tags

CCSS.6.RP.A.3B

A recipe requires 3 eggs for every 2 cups of milk. If you have 12 eggs, how many cups of milk can you use? Check if your answer makes sense.

• 8 cups of milk

• 4 cups of milk

• 10 cups of milk

• 6 cups of milk

If 5 notebooks cost $15, how much would 8 notebooks cost? Use proportions to find the answer and check for reasonableness.

• $20

• $18

• $24

• $30

Tags

CCSS.7.RP.A.3

A painter mixes 3 parts blue paint to 2 parts yellow paint. If he uses 12 cups of blue paint, how many cups of yellow paint does he need? Solve using proportions and check your work.

• 6 cups of yellow paint

• 10 cups of yellow paint

• 4 cups of yellow paint

• 8 cups of yellow paint

Tags

CCSS.7.RP.A.3

A car can travel 240 miles on 8 gallons of gas. How far can it go on 12 gallons? Use cross-multiplication to find the answer and check if it is reasonable.

• 360 miles

• 240 miles

• 300 miles

• 480 miles

Tags

CCSS.7.RP.A.3

In a fruit basket, the ratio of apples to oranges is 3:4. If there are 24 apples, how many oranges are there? Use proportions to solve and verify your answer.

• 28

• 40

• 32

• 36

Tags

CCSS.7.RP.A.3

A school has a ratio of 2 teachers for every 25 students. If there are 100 students, how many teachers are needed? Apply cross-multiplication and check for reasonableness.

• 4

• 8

• 12

• 10