Question

Find y in the following proportions:

(i) y: 6 = 60: 12

(ii) 18: y = 27: 3

(iii) 7: 28 = 15: y

Answer 1

Step-by-step explanation:

(i) y = 30

(ii) y = 2

(iii) y = 60

Answer 2

Answer:

(i) If  y: 6 = 60: 12 then y = 30

(ii) If 18: y = 27: 3 then y= 2

(iii) If 7: 28 = 15: y then y = 60

Step-by-step explanation:

(i) y: 6 = 60: 12

$\frac{y}{6} =\frac{60}{12} \\\frac{y}{6} = 5\\y = 5 \times 6\\y = 30$

(ii) 18: y = 27: 3

$\frac{18}{y} =\frac{27}{3} \\\frac{18}{y} = 9\\9y = 18\\y = 18/9\\y = 2$

(iii) 7: 28 = 15: y

$\frac{7}{28} =\frac{15}{y} \\\frac{1}{4} =\frac{15}{y} \\y = 4 \times 15\\y = 60$