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Step-4

Title: Ratio & Proportion

Grade: 1300-a Lesson: S4-L8

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

Lesson Steps

Step	Type	Explanation	Answer
1	Problem	Find the fourth proportion to 5 , 10 and 12.
2	Step	Let us take the third proportion is	\$x\$
3	Step	We can write the above numbers in the proportional form (a : b :: c : d)	\$5 : 10::12 : x\$
4	Hint	\$a/b::c/d\$
5	Step	Here a = 5 , b = 10 , c = 12 & d = x
6	Step	Let us find the x value	x = \$ (10 \times 12)/5\$ x = \$24\$
7	SumUp	Can you summarize what you’ve understood in the above steps?
8	Choice.A	This is incorrect. It doesn’t satisfy the proportion equation	20
9	Choice.B	This is correct because it satisfies the proportion equation	24
10	Choice.C	This is incorrect. It doesn’t satisfy the proportion equation	22
11	Choice.D	This is incorrect. It doesn’t satisfy the proportion equation	21
12	Answer	Option	B
13	SumUp	Can you summarize what you’ve understood in the above steps?

Step

Type

Explanation

Answer

Problem

Find the fourth proportion to 5 , 10 and 12.

Step

Let us take the third proportion is

\$x\$

Step

We can write the above numbers in the proportional form
(a : b :: c : d)

\$5 : 10::12 : x\$

Hint

\$a/b::c/d\$

Step

Here a = 5 , b = 10 , c = 12 & d = x

Step

Let us find the x value

x = \$ (10 \times 12)/5\$

x = \$24\$

SumUp

Can you summarize what you’ve understood in the above steps?

Choice.A

This is incorrect. It doesn’t satisfy the proportion equation

Choice.B

This is correct because it satisfies the proportion equation

Choice.C

This is incorrect. It doesn’t satisfy the proportion equation

Choice.D

This is incorrect. It doesn’t satisfy the proportion equation

Answer

Option

SumUp

Can you summarize what you’ve understood in the above steps?