Question

find the fourth term of the following proposition?


1. 21 27 14

2. 57 76 108

3. 3 9 27

4. 1 10 100

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Answer 1

Answer:

1 )

3 × 7 = 21

3 × 9 = 27

Now ,

Use same multiples 7 & 9;

2 × 7 = 14

2 × 9 = 18

3 )

3 × 3 = 9

9 × 3 = 27

27 × 3 = 51

4 )

1 × 10 = 10

10 × 10 = 100

100 × 10 = 1000

Answer 2

Answer:

$1. \: \frac{21}{27 } = \frac{14}{x } \\ \: \: \: \: \: \: 378 = 21x \\ x = \frac{378}{21} = 18 \\ so \: the \: fourth \: number \: is \: 18$

$3. \frac{3}{9} = \frac{27}{x} \\ 243 = 3x \\ x = \frac{243}{3} = 81 \\ so \: th \: fourth \: number \: is \: 81$

$4. \frac{1}{10} = \frac{100}{x} \\ 1000 = x \\ x = 1000 \\ so \: the \: fourth \: number \: is \: 1000$

$2. \frac{57}{76 } = \frac{108 }{x } \\ 8208 = 57x \\ x = \frac{8208}{57 } = 144 \\ so \: the \: fourth \: number \: is \: 144$

Step-by-step explanation:

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