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# Calculate the value of x:

30 : 45 = 18 : x

Question:

30 : 45 = 18 : x

A
x = 27

Explaination

To find the unknown value in a ratio, we rewrite the ratios as fractions and use some conversions or cross-multiply.

Step 1: Rewrite the ratios as fractions

30:45 = 18:x is equivalent to (30/45) = (18/x)

Step 2: Cross-multiply the fractions

30 × x = 18 × 45

30x = 810

Step 3: Divide both of the sides by 30 to get x

(30x/30) = (810/30)

810 ÷ 30 = 27

x = 27

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