Applications of Proportion

A painter uses 15 gallons of paint to paint 5 small rooms. How many small rooms can he paint with 12 gallons of paint?

• 3 small rooms

• 4 small rooms

• 5 small rooms

• 6 small rooms

Hassan paid QR 30 for 10 pounds of candy. At this rate, how much would 13 pounds of candy cost?

• QR 42

• QR 33

• QR 36

• QR 39

Fatima bought 5 kg of banana for QR 20. At the same rate, what would 9 kg of banana cost?

• QR 36

• QR 32

• QR 40

• QR 44

The ratio of the length to the width in a certain rectangle is 7:5, if the length of the rectangle is 21 cm, what is the width of the rectangle?

• 8 cm

• 10 cm

• 15 cm

• 12 cm

The ratio of salt to water in a solution is 3:11. If the solution contains 44 g of water, what is the amount of salt ?

• 9 g

• 11 g

• 12 g

• 15 g

The ratio of boys to girls in a school is 3:2, if the there are 40 girls in the school, how many boys are there?

• 40 boys

• 45 boys

• 50 boys

• 60 boys

Khalid bought 7 kg of apples for QR 28. At the same rate, what would 10 kg of apples cost?

• QR 40

• QR 44

• QR 36

• QR 32

A building is 50 feet tall and cast a 150-foot shadow, a nearby stop sign cast a 24-foot shadow. How tall is the stop sign?

• 8 ft

• 10 ft

• 12 ft

• 24 ft

You have a class photo that is 10 inches long and 8 inches wide if you want to enlarge your photo to be 15 inches long how wide would it be.

• 16 in.

• 9 in.

• 12 in.

• 15 in.

A tree is 12 feet tall and casts a shadow 9 feet long. A building nearby casts a shadow that measures 24 feet. How tall is the building? (Draw a picture, set up a proportion)

• 24 feet
• 21 feet
• 27 feet
• 32 feet