Proportion Setup

In 30 days, Sofia's chickens lay 87 eggs. About how many eggs can Sofia expect the chickens to lay in 365 days? Set up the proportion.

Sam used 6 loaves of bread on an 8 day hiking trip. How many loaves should he pack for a 12 day hiking trip if he eats the same amount of bread each day? Set up the proportion.

Rita is cooking for a Sunday brunch. She knows that 22 pancakes can feed 8 people. How many people can she feed with 55 pancakes? Set up the proportion.

Stan's cookie recipe makes 24 cookies and calls for exactly 384 sprinkles. How many sprinkles will he need to make 60 cookies? Set up the proportion.

The relationship between two quantities where one quantity is a constant multiple of the other quantity.

• Proportional relationship

• Linear relationship

• Inversely proportional

• Direct relationship

How do you know whether two quantities x and y are proportional?

• Every sum x + y is the same for related pairs of x and y.

• Every x term is a multiple of the previous term.

• Every difference x – y is the same for related pairs of x and y.

Answer explanation

Proportional relationships are equivalent ratios.

Tags

CCSS.MATH.CONTENT.7.RP.A.2.a

You can buy 4 tickets for $75 or 5 tickets for $94. Are the costs proportional?

• Yes

• No

Set up this proportion: Vito uses 9 liters of water to water 24 flower pots. He is wondering how many liters of water (w), it would take to water 40 flower pots. He assumes he'll use the same amount of water on each pot.

Determine if the following pairs of quantities are proportional: (2, 3), (4, 6), (6, 9).

• Yes

• No

Set up this proportion:

Vito uses 9 liters of water to water 24 flower pots. He is wondering how many liters of water (w), it would take to water 40 flower pots. He assumes he'll use the same amount of water on each pot.