Proportions and Ratios

Two numbers are in the ratio 7 : 9. If the sum of the numbers is 112, then the larger number is

• 49

• 72

• 63

• 42

Which of these ratios is equivalent to 3:4?

• 12:9

• 9:20

• 9:12

• 803:804

A bag of marbles comes with 3 blue marbles, 2 red marbles, and 5 yellow marbles. What is the ratio of red to yellow?

• 2 to 5

• 5 to 3

• 3 to 5

• 5 to 2

Write the ratio of the first measurement to the second measurement.

Length of a classroom:  18 ft 4 in
Length of a closet:  48 in                  

• 55/12

• 12/55

• 9/2

• 2/9

Write the ratio of the first measurement to the second measurement.

Length of the school bus: 9 yd
Length of an SUV: 12 ft              

• 9/4

• 4/9

• 3/4

• 4/3

Solve for x
20/5 = x/25

• x=100

• x=4

• x=120

• x=5

Solve for n
12/6 =  4/n

• n=4

• n=2

• n=3

• n=6

The ratio of cars to trucks in the parking lot is 3:5.  If there are 360 vehicles in the parking lot, how may are trucks?

• x = 270 cars

• x = 225 cars

• x = 225 trucks

• x = 270 trucks

The extended ratio of the sides of a triangle are 2:4:7. Find the length of the shortest side if the perimeter is 117 inches.

• 18 inches

• 9 inches

• 36 inches

• 63 inches

Write a ratio in simplest form:
10 automobiles to 13 bikes

• 1/3

• 10/13

• 4/5

• 3/1