Real-Life Proportions: Cross-Multiplication Challenge

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?

• 4 cups of flour

• 3 cups of flour

• 2 cups of flour

• 5 cups of flour

A car travels 150 miles on 5 gallons of gas. How many gallons of gas would it need to travel 300 miles?

• 20 gallons

• 10 gallons

• 15 gallons

• 5 gallons

If 4 apples cost $2, how much would 10 apples cost?

• $3.00

• $4.00

• $5.00

• $6.00

A map shows that 1 inch represents 20 miles. If two cities are 3 inches apart on the map, how far apart are they in real life?

• 40 miles

• 100 miles

• 80 miles

• 60 miles

A school has a ratio of 3 teachers for every 20 students. If there are 60 students, how many teachers are there?

• 6

• 9

• 12

• 15

If a recipe requires 5 tablespoons of oil for 10 servings, how many tablespoons of oil are needed for 25 servings?

• 10 tablespoons

• 15 tablespoons

• 20 tablespoons

• 12.5 tablespoons

A car can travel 240 miles on 8 gallons of gas. How far can it travel on 12 gallons of gas?

• 300 miles

• 360 miles

• 240 miles

• 480 miles

If 6 notebooks cost $12, how much would 15 notebooks cost?

• $30

• $18

• $36

• $24

A painter can paint 3 rooms in 4 hours. How long will it take to paint 9 rooms?

• 12 hours

• 15 hours

• 8 hours

• 10 hours

If a 12-ounce bottle of soda costs $1.50, how much would a 20-ounce bottle cost based on the same price per ounce?

• $2.00

• $2.50

• $3.00

• $1.75