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| Math Central | Quandaries & Queries |
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Question from Errin: the price of the watermelon is directly proportional to its weight. If a watermelon that weighs 22 pounds cost $\$5.40,$ how much will a 17.5 pound watermelon cost? |
Hi Errin,
How much would a 11 pound watermelon cost? $\large \frac{22}{2} \normalsize = 11$ so 11 is half of 22 and hence the 11 pound watermelon will cost $\large \frac{\$5.40}{2} \normalsize = \$2.70.$ Likewise if a watermelon is one quarter the weight of the 22 pound watermelon it will cost one quarter of $\$5.40.$
What fraction of 22 pounds is 17.5 pounds?
I hope this helps,
Penny
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