Real-Life Ratios: Solving Proportions and Recipes

A recipe calls for 2 cups of flour for every 3 cups of sugar. If you want to make a smaller batch using 4 cups of sugar, how many cups of flour do you need?

• 1.5 cups of flour

• 3 cups of flour

• 2.67 cups of flour

• 4 cups of flour

In a class, the ratio of boys to girls is 3:5. If there are 15 boys, how many girls are there in the class?

• 35

• 25

• 30

• 20

A car travels 120 miles on 4 gallons of gas. How many miles can it travel on 10 gallons of gas?

• 150 miles

• 180 miles

• 240 miles

• 300 miles

If a map has a scale of 1 inch to 20 miles, how many miles are represented by 3 inches on the map?

• 60 miles

• 100 miles

• 80 miles

• 40 miles

A gardener mixes 2 parts of soil to 5 parts of compost. If he uses 14 parts of compost, how much soil does he need?

• 3.2 parts of soil

• 5.6 parts of soil

• 10.5 parts of soil

• 7.0 parts of soil

In a fruit basket, the ratio of apples to oranges is 4:3. If there are 28 apples, how many oranges are there?

• 30

• 18

• 21

• 24

A recipe requires 3 tablespoons of oil for every 2 cups of rice. If you are using 8 cups of rice, how many tablespoons of oil do you need?

• 6 tablespoons

• 8 tablespoons

• 10 tablespoons

• 12 tablespoons

A school has a ratio of 2 teachers for every 25 students. If there are 100 students, how many teachers are needed?

• 10 teachers

• 6 teachers

• 4 teachers

• 8 teachers

If a car can travel 150 miles on 5 gallons of gas, what is the equivalent ratio of miles to gallons?

• 40 miles per gallon

• 35 miles per gallon

• 30 miles per gallon

• 25 miles per gallon

A recipe uses a ratio of 1:4 for salt to water. If you have 2 cups of salt, how much water do you need?

• 6 cups of water

• 4 cups of water

• 8 cups of water

• 10 cups of water