Question

Enter numbers into the table so that the paired values are in a proportional relationship
X
1
2
3
5
10
у
15
20
25

Answer 1

The missing number in the row $x$ is $4$ and the missing number in the row of $y$ is $5$.

The values are in proportion,  

So, $\frac{1}{}=\frac{2}{10}=\frac{3}{15}=\frac{}{20}=\frac{5}{25}$

Substitute $a$ in the first blank and $b$ in the second blank

$\frac{1}{a}=\frac{2}{10}=\frac{3}{15}=\frac{b}{20}=\frac{5}{25}$

Take $\frac{1}{a}=\frac{2}{10}$

$a=\frac{10}{2}$

$a=5$

Take $\frac{3}{15}=\frac{b}{20}$

$b=\frac{3}{15}\times 20$

$b=4$

So, the numbers in the table are entered as  

Learn more about proportion here:

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