Using proportions, it is found that you need an income of $124,722.22 to claim a $22,450 contribution in 2011.
A proportion is a fraction of a total amount, and the measures are related using a rule of three.
To claim a $22,450 contribution in 2011, this amount has to be 18% of your income, hence:
0.18x = 22450
x = 22450/0.18
x = $124,722.22.
You need an income of $124,722.22 to claim a $22,450 contribution in 2011.
More can be learned about proportions at https://brainly.com/question/24372153
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