Ratios and Proportional Relationships

Solve for the variable by taking the cross product (cross multiply)

x = _____

Solve for the variable by taking the cross product (cross multiply)

y = _____

Manny and his family set out to sea on a fishing trip. There is a proportional relationship between the time (in hours) Manny and his family spend sailing, x, and their distance from the shore (in miles), y. What is the constant of proportionality?

• 0.25

• 3

• 4

• 20

While playing basketball, Dariel notices that the amount of shots he makes is proportional to the number of minutes he has played. He makes 15 shots every 6 minutes. How many shots will he make in 18 minutes? Set up and solve a proportion for the value of s.

• 15 cartons/toy

• 5 toys/carton

• 5 cartons/toy

• 15 toys/carton

While buying an ice cream sundae, Jayla notices that the cost is proportional to the number of scoops of ice cream. The ice cream shop charges $3.00 for every 2 scoops of ice cream. If Jayla gets 7 scoops of ice cream, what will the cost be? Set up and solve a proportion for the cost, c.

The relationship between the time (in minutes), x, and the amount of water used (in gallons), y, is proportional. According to the graph, how many gallons of water is used per minute?

• 5

• 10

• 15

• 35

Write an algebraic equation that can be used to find the amount of gallons of water used, y, for any number of minutes, x.

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The ratio of grapes to cherries in a fruit salad is 5 : 2. If there are 15 grapes, then how many cherries are there?

• 2

• 6

• 7

• 15

The ratio of boys to girls in a 7th grade class at BAL is 2 : 3. If there are 12 girls in the class, how many boys are there?

• 8

• 10

• 18

• 20