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Lesson Topics Discussion Quiz: Class Homework

Example1

Title: Proportion

Grade Lesson s3-l6

Explanation: The best way to understand SAT-4 is by looking at some examples. Take turns and read each example for easy understanding.

Examples

Topics → Definition Example1

Solve for x :

\$(x + 3) : 5\$ = \$(x + 6) : 3\$

Step: 1

Convert the provided proportion into a fraction:

\$(x + 3) /5\$ = \$(x + 6) / 3\$

Explanation:

Here, converting proportion into a fraction:

\$(x + 3) /5\$ = \$(x + 6) / 3\$

Step: 2

For this step, multiply the numbers using cross-multiplication:

\$(x + 3)3\$ = \$(x + 6)5\$

Explanation:

Now cross-multiply the numbers, then we get:

3x + 9 = 5x + 30

Step: 3

We are currently determining the value of x:

2x = 21

Explanation:

In this step: 5x - 2x = 30 - 9

2x = 21

\$x = (21)/2\$

Step: 4

After simplification x = 10.5

Explanation:

The value of x is 21 divided by 2, which equals 10.5.