Proportions
1.
Show that
3 6
 .
2 4
Now find the value of
3 2
64
.
and
3– 2
6–4
What do you notice?
2.
3.
Copy and complete the table below (and simplify your answer).
42
 ........
4–2
12  6
 ........
12 – 6
2 4

3 6
23
 ........
2–3
46
 ........
4–6
4 8

1 2
4 1
 ........
4 –1
8 2
 ........
8–2
Based on your investigation above, complete the missing values.
If
4.
4 12

2 6
a
b

c
d
, then
..... ..... ..... .....

..... – ..... ..... – .....
Give two examples of your own to show that the formula you found
works.