Question

8. Find x in the following proportion
(i) 5:4:x:12
Product of Means = Product of Extreme
4*x=5*12
x=5*12/4=15
x=15
(ii) x:4 ::3:12
(iii) 55:70::11:x
(iv) 18:42::x:7
(v) 7:x:3:6
(vi) 8:7::x:21​

Answer 1

Answer:

ii.1

iii.14

iv.24

Step-by-step explanation:

ii.X x 12=3×4

X = 12 /12

X = 1

iii. 55 × x = 70×11

x = 770/55

x = 14

iv. 8×21=x×7

x = 8×3

x = 24

Answer 2

Answer:

(ii).1

(iii).14

(iv).3

(v).14

(vi).24

Step-by-step explanation:

(ii)x×12=4×3

12x=12

x=12÷12

x=1 ans

(iii)55×x=70×11

55x=770

x=770÷55

x=14 ans

(iv)18×7=42×x

126=42x

42x=126

x=126÷42

x=3 ans

(v) 7×6=3×x

42=3x

3x=42

x=42÷3

x=14 ans

(vi)8×21=7×x

168=7x

7x=168

x=168÷7

x=24 ans