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RP.8.4

Find missing terms in equivalent ratios

Find the missing term in a pair of equivalent ratios (eg. currency and unit conversion)

3 hand-picked video lessons for this topic, each checked for relevance and clarity, graded by difficulty and labelled by depth. Press play to watch — nothing loads from YouTube until you do.

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Grade 2–4 Core 🇬🇧 UK

How to Find the Missing Term in a Pair of Equivalent Ratios - easy peasy!

Maths Mash 19K views

UK teacher works through six missing-term examples using simple multiply and divide.

Jump to 0:28Example question 5:6 = ?:24 2:01Example question 9:4 = 81:?2:39Example question 2:? = 14:70 3:48Example question 1:8 = 5:?4:16Example question ?:3 = 24:6 5:17Example question ?:7 = 24:42

Grade 2–4 Core 🇺🇸 US

Finding the Missing Number in an Equivalent Ratio

Math with Mr. J 304K views

Clear step-by-step method for finding the unknown value in an equivalent ratio.

Grade 2–4 Core 🇬🇧 UK

Equivalent RATIOS To Find The Unknown Value

The Maths Guy! 17K views

UK teacher shows how to scale ratios up or down to find a missing value.