Using Proportions to Solve Standard Measurements

Solve the proportion:

• 4

• 8

• 14

• 10

Solve the proportion.

• 1

• 3

• 6

• 5

Solve for x

• x=6

• x =1/6

• x = 7

• x=9

Solve for x 

• x = 1/10

• x = 10

• x = 4

• x = 5

If the ratio of pencils to pens in a box is 7:5, how many pens are there if there are 21 pencils?

• 15

• 18

• 12

• 14

Answer explanation

To find the number of pens, set up fractions as an equality like this: 7/5 =21/x. 7*3 is 21, so multiply the 5 by 3 as well to get the number of pens, 15.

If a recipe calls for a ratio of 2 cups of flour to 3 cups of sugar, how many cups of sugar are needed if 8 cups of flour are used?

• 6

• 10

• 12

• 14

Solve for x 

• x = 15

• x = 11

• x = 1/11

• x = 20

About 13 out of 20 homes have a personal computer.  On a street with 60 homes, how many would you expect to have a personal computer?

• 7 homes

• 39 homes

• 73 homes 

• 40 homes

Hamburger meat sells for $6 for every 3 pounds. If Alicia buys 10 pounds of hamburger meat, how much will she pay?

• $30

• $20

• $60

• $10

Complete the ratio table.

• 6

• 8

• 9

• 5