Question

find value of x if :
a) x : 3 : 15 : 9
b)1/13 : x : 1/2 : 1/5
c)1.7 : 5.1 : 1.9 : x

Answer 1

Answer:

a) x=5

b) x=2/65

c) x=5.7

Step-by-step explanation:

Product of extremes = product of means

Answer 2

Answer:

a) x = 5

b) x = 2/65

c) x = 5.7

Step-by-step explanation:

a) 3 × 15 = 9x

45 = 9x

x = 45÷9

x = 5.

b) 1/13 × 1/5 = 1/2 × x

1/65 = 1/2 × x

x = 1/65 ÷ 1/2

x = 1/65 × 2/1

x = 2/65.

c) 5.1 × 1.9 = 1.7 × x

9.69 = 1.7 × x

x = 9.69 ÷ 1.7

x = 5.7