Question 68527
x/5=20/4
 In this problem you can use Ratio and Proportion to solve for x.
Note: <b>Ratio</b> is the comparison of two quantities and <b>Proportion</b> on the other hand is a statement that ratios are equal.
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Anyway, in the problem {{{x/5=20/4}}}, so solve for x. you can use Property of Proportions. It states that in a proportion, the product of the means equals the product of the extremes. For any real number a, b, c, and d, b&#8800;0 and d&#8800;0:
<i>If {{{a/b = c/d}}} , then a*d = b*c </i>

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{{{x/5=20/4}}}
so {{{4*x = 5*20}}}
4x = 100 , Divide both sides by 4 to solve for x.
{{{highlight (x = 25)}}}