How do you solve for the unknown variable in a proportion?
A proportion is an equation that states that two ratios are equal. It is written in the form:
a/b = c/d
where b and d are not equal to zero. To solve for the unknown variable, you can use cross-multiplication, which is a method that involves multiplying the numerator of one ratio by the denominator of the other ratio.
For example, if you have the proportion:
3/4 = x/8
To solve for x, you can cross-multiply:
3 x 8 = 4 x x
Simplifying the left side:
24 = 4x
And then solving for x:
x = 6
Therefore, the unknown variable, x, is equal to 6.
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