Intro to Solving Proportions Review

Vocabulary

100

a word meaning "equal to"

equivalent

200

a comparison of two quantities

ratio

300

two equivalent ratios make up a ______.

proportion

Writing Proportions

100

A girl scout troop uses 14 flashlight batteries on a three-night camping trip. If they are planning a seven-night trip, write a proportion to determine how many batteries they should bring? *do not solve*

14/3 = x/7

200

A bag of 8 apples costs $1.50 at Sam’s Orchard. At this same rate,  write a proportion to determine how much 18 apples would cost.  *do not solve*

8/1.50 = 18/x

300

You can buy 3 shirts for $24. Write a proportion that gives the cost c of buying 7 shirts. *do not solve*

$24/3 shirts = c/7 shirts

Solving Proportions

100

Solve the proportion: 

9/5 = x/20

z = 36

200

Solve the proportion: 

10/7 = 8/k

k = 5.6

300

It costs $10.50 for 3 medium pizzas. How much does it cost to buy 10 medium pizzas?

It will cost $35 for 10 medium pizzas.