Easy
If 24 : x = 12 : 18, then the value of x is -
Explanation
Explanation
In a proportion a:b = c:d, cross-multiplying gives a×d = b×c. Here 24:x = 12:18, so cross-multiply: 24 × 18 = x × 12, which gives 432 = 12x, so x = 432 ÷ 12 = 36. So the correct answer is 36, option (1).
PRO TIP
Re-check your working by substituting the answer back into the original question.