Question

what is the missing term in portion 3:5 = 12:n?​

Answer 1

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The missing term in proportion is 3:5 12:20

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☃️Full solution☃️

n = ?

• 12 is a multiple of 3
• 3 × 4 = 12 so,

$\frac{3}{5} \times \frac{4}{4} = \frac{12}{20}$

Hence, 5 × 4 = 20

so, n = 20

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