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Step-2

Title: Proportion

Grade: 8-a Lesson: S2-L6

Explanation: Hello Students, time to practice and review the steps for the problem.

Lesson Steps

Step	Type	Explanation	Answer
1	Problem	Solving the Proportion \$3 : 12\$ :: \$5 : x\$.
2	Step	Given Proportion.	\$3 : 12\$ :: \$5 : x\$
3	Step	First, convert the provided proportion into a fraction.	\$3/12\$ = \$5/x\$
4	Step	To solve the proportion, begin by cross-multiplying.	\$3 \times x\$ = \$12 \times 5\$ ⇒ \$3x = 60\$
5	Step	Divide both sides by the number connected to the variable	\$(3x)/3 = 60/3\$
6	Step	The value of x is:	\$ x\$ = \$60/3\$ = \$20\$
7		Answer	A

Step

Type

Explanation

Answer

Problem

Solving the Proportion \$3 : 12\$ :: \$5 : x\$.

Step

Given Proportion.

\$3 : 12\$ :: \$5 : x\$

Step

First, convert the provided proportion into a fraction.

\$3/12\$ = \$5/x\$

Step

To solve the proportion, begin by cross-multiplying.

\$3 \times x\$ = \$12 \times 5\$
⇒ \$3x = 60\$

Step

Divide both sides by the number connected to the variable

\$(3x)/3 = 60/3\$

Step

The value of x is:

\$ x\$ = \$60/3\$ = \$20\$

Answer