3
5

and
6
12

3
5

=
6
12

3
5
= 0.60

6
12
= 0.5

The cross products for
3
5

and
6
12
are

36 is not equal to 30. Therefore,
3
5

and
6
12
do not form a proportion

Another example: Do
10
16

and
5
8
form a proportion ?

If
a
b

=
c
d
is a proportion

3
5

and
6
12

3
5

=
6
12

3
5
= 0.60

6
12
= 0.5

The cross products for
3
5

and
6
12
are

3
5

and
6
12
do not form a proportion

Do
10
16

and
5
8
form a proportion ?

If
a
b

=
c
d
is a proportion

Mar 13, 19 11:50 AM
Learn how to derive the equation of an ellipse when the center of the ellipse is at the origin.
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Mar 13, 19 11:50 AM
Learn how to derive the equation of an ellipse when the center of the ellipse is at the origin.