Chapter 2: Q10. (page 149)

Record your answers on the answer sheet provided by your teacher or on a sheet of paper.
Solve the proportion $\frac{x}{18} = \frac{7}{21}$ .

Short Answer

Expert verified

The value of x is 6

Step by step solution

Step 1. Given information.

A proportion $\frac{x}{18} = \frac{7}{21}$ .

Step 2. Concept used.

We use the cross-product rule.

As $\frac{a}{b} = \frac{c}{d} \Rightarrow a d = b c$ where $a, b$ are two numbers.

Step 3. To find the value of x.

Solve the given proportion

$\begin{array}{l} \frac{x}{18} = \frac{7}{21} \\ \Rightarrow 21 x = 7 \times 18 \\ \Rightarrow x = \frac{7 \times 18}{21} \\ \Rightarrow x = \frac{18}{3} \\ \Rightarrow x = 6 \end{array}$

Hence, the value of x is $6$ .

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Record your answers on the answer sheet provided by your teacher or on a sheet of paper.
Solve the proportion $\frac{x}{18} = \frac{7}{21}$ .

Short Answer

Step by step solution

Step 1. Given information.

Step 2. Concept used.

Step 3. To find the value of x.

One App. One Place for Learning.

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Record your answers on the answer sheet provided by your teacher or on a sheet of paper.Solve the proportion x18=721.

Short Answer

Step by step solution

Step 1. Given information.

Step 2. Concept used.

Step 3. To find the value of x.

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Math Textbooks

Theoretical and Mathematical Physics

Mechanics Maths

Discrete Mathematics

Applied Mathematics

Geometry

Calculus

Study anywhere. Anytime. Across all devices.

Record your answers on the answer sheet provided by your teacher or on a sheet of paper.
Solve the proportion $\frac{x}{18} = \frac{7}{21}$ .