Solving Proportions for Missing Values

Solve the proportion:

• 15

• 5

• 10

• 12

Solve the proportion

• x = 3

• x = -3

• x = 1

• x = -1

Solve for b 

• b = 8

• b = 17/12

• b = 4/3

• b = 1/8

Solve:

• -4

• 10

• 3

• -4

In the table, the ratio of y to x is constant.

What is the value of the missing number?

• 15

• 20

• 25

• 30

This is a table with a proportional relationship between A and B.  Find the missing value of B. 

• 33

• 44

• 32

• 48

Marvin's son is 3 ft tall. He casts a shadow of 1 foot. Marvin casts a shadow of 2.5 ft. How tall is Marvin?

• 3 ft

• 7.5 ft

• 1.2 ft.

• 0.8 ft.

Which proportion would be correct in order to solve for x.  (Hint: you need to find a missing piece)

• x/10 = 15/30

• x/10 = 45/30

• x/10 = 15/45

• x/10 = 30/15

Mathematical Equivalence

ON

This is a table with a proportional relationship between A and B.  Find the missing value of B. 

Mathematical Equivalence

ON