In order to convert square feet to acres, first you need to know how many square feet there are in an acre. By definition 1 acre is equal to 43560 square feet. Study the example below carefully. It shows how to convert 130680 square feet to acres.
As you can see from the example above, 1 acre is equal to 43560 square feet. This relationship between square feet and acres can help you convert any area that is in square feet to acres.
Example #1
Convert 87120 square feet to acres.
We can solve this problem by setting up a proportion the exact same way it is demonstrated in the example in the figure above.
"If" 43560 square feet is equal 1 acre,
"then" 87120 square feet is equal to x acres.
Here is table that summarizes this problem.
43560 | 1 acre |
87120 | x |
The proportion is 43560 / 87120 = 1 acre / x
After cross multiplication, we get 43560 × x = 87120 × 1 acre
43560x = 87120 acres
x = 87120 acres / 43560
x = 2 acres
87120 square feet is equal to 2 acres.
Notice how we put the numbers in the table in the same order as they were in the "if-then" sentence. It is very important to pull out the numbers in the same order!
Your "if-then" sentence could have been instead what you see below.
"If" 1 acre is equal 43560 square feet,
"then" x acres is equal to 87120 square feet
Your table will then look a little bit different as you pull out the numbers. However, you will still get the same answer when you set up the proportion and solve it.
1 acre | 43560 |
x | 87120 |
Example #2
Convert 21780 square feet to acres.
Again, this problem can be solved by setting up a proportion.
"If" 43560 square feet is equal 1 acre
"then" 21780 square feet is equal to x acres
Here is table that summarizes this problem.
43560 | 1 acre |
21780 | x |
The proportion is 43560 / 21780 = 1 acre / x
After cross multiplication, we get 43560 × x = 21780 × 1 acre
43560x = 21780 acres
x = 21780 acres / 43560
x = 0.5 acres
21780 square feet is equal to 0.5 acres.
May 07, 21 02:29 PM
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