Question

Solve the proportion for X
$\frac {20}{16} × \frac{5}{X} what is x$

Answer 1

Answer:

  x = 4

Step-by-step explanation:

If we assume you mean ...

  $\dfrac{20}{16}=\dfrac{5}{x}$

we can find the value of x by multiplying both sides of the equation by 4x/5. This gives ...

  $\dfrac{20\cdot 4x}{16\cdot 5}=\dfrac{5\cdot 4x}{x\cdot 5}$

  $x=4 \qquad\text{cancel common factors}$

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If you simplify the fraction in the original proportion, you see it is ...

  $\dfrac{5}{4}=\dfrac{5}{x}$

and it is obvious that x=4.