Jensen is making fruit punch for a party. The recipe calls for 3 cups of lemonade and 7 cups of orange juice. If Jensen used 28 cups of orange juice, how many cups of the lemonade did he use in the fruit punch?
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To find out how many cups of lemonade Jensen used in the fruit punch, we can use proportion.
Let's set up a proportion based on the initial recipe:
3 cups of lemonade / 7 cups of orange juice = X cups of lemonade / 28 cups of orange juice
Cross multiplying, we get:
3 cups of lemonade * 28 cups of orange juice = 7 cups of orange juice * X cups of lemonade
84 cups of lemonade = 7X cups of lemonade
To isolate X and find out the number of cups of lemonade Jensen used, we divide both sides of the equation by 7:
84 cups of lemonade / 7 = X cups of lemonade
12 cups of lemonade = X
Therefore, Jensen used 12 cups of lemonade in the fruit punch.