A punch recipe calls for 1.5 L of fruit juice and 700mL of gingerale. How much fruit juice is needed for 2.5 L of gingerale?

Note:1 L = 1000mL

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This is a proportions problem, Fruit Juice / Gingerale. First, get all your units the same, so 700ml = .7 L. Now set up the proportion:

1.5 L Fruit Juice / .7 L Gingerale = x L Fruit Juice / 2.5 L Gingerale, so

1.5 / .7 = x / 2.5

.7x = 1.5 * 2.5

.7x = 3.75

x = 5.36 L

Lets convert liters to milliliters

If 1L=1000ml

So, 1.5L= 1500ml

2.5L= 2500ml

This involves direct proportion

x/2500= 1500/700

multiply by 2500ml

x= 1500/700*2500

= 5357ml

= 5.357 L

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