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2 years ago

Student Name:

Mathematics

1 answer:

Katena32 [7]2 years ago

5 0

The fourth proportionals are bc/a and st/r

<h3>How to determine the fourth proportional?</h3>

<u>Segments a, b and c</u>

Let the fourth segment be x.

So, we have the following equivalent ratio

a : b = c : x

Express as fraction

a/b = c/x

Make x the subject

x = bc/a

<u>Segments r, s and t</u>

Let the fourth segment be x.

So, we have the following equivalent ratio

r : s = t : x

Express as fraction

r/s = t/x

Make x the subject

x = st/r

Hence, the fourth proportionals are bc/a and st/r

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