Solving Proportions with Cross Multiplication

Solving Proportions Review

Review for Circle Graphs

Solving a Proportion

• Multiply Top Left and Bottom Right

• Multiply Bottom Left and Top Right

Solving a Proportion

• Then divide to find the missing number

Multiple Choice

$$\frac{4}{5}=\frac{8}{x}$$  

• x = 8

• x = 10

• x = 4

• x = 5

Multiple Choice

$$\frac{x}{5}=\frac{8}{10}$$  

• x=7

• x=4

• x=2

• x=3

Multiple Choice

 

$$\frac{21}{x}=\frac{6}{8}$$  

• x = 6

• x = 25

• x = 28

• x = 17

Multiple Choice

$$\frac{9}{10}=\frac{p}{60}$$  

• 50

• 56

• 54

• 55

Multiple Choice

$$\frac{15}{25}=\frac{18}{x}$$  

• x=28

• x=10

• x=30

• x=11