Proportions

Are the ratios proportional? $\frac{3}{4}=\frac{18}{24}$   

• YES

• NO

Are the ratios proportional? $\frac{5}{8}=\frac{25}{35}$   

• YES

• NO

Find the missing number in the proportion. $\frac{4}{9}=\frac{x}{36}$   

• 9

• 11

• 16

• 1

Find the missing number in the proportion. $\frac{2}{3}=\frac{14}{x}$   

• 7

• 21

• 15

• 0

What is the constant of proportionality in the equation $y=3x$   

• 3

• x

• 3x

What is the constant of proportionality in the equation $y=\frac{3}{4}x$   

• 3

• 4

•  $\frac{3}{4}$  

• x

Jack ran 4 miles in 20 minutes. How many miles did he run in 30 minutes?

• 5

• 80

• 6

In the lunch room, there are 12 boys for every 15 students.  If there are 90 students, how many are girls? 

• 18

• 72

• 3

• 80