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Find the missing value in each proportion.

Math notes: A proportion is an equation which shows two equivalent ratios.

Cross products of a proportion are always equal.

1. 18/33 = n/11

2. 2/26 = 3/n

3. n/5 = 8/10

4. 16/5 = n/20

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All you have to do is cross-multiply and divide. For example, number 1 would be n=(11*18)/33=6. Number 2 is n=(3*26)/2=39. Just repeat the process for the last two.

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