Finding the Fourth Proportional to 20,405,654.12, 28,126,982.08 and 13,788,176.68
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Solution
The fourth proportional to 20,405,654.12, 28,126,982.08 and 13,788,176.68 is: 19,005,506.81
Step by Step Solution
- Step 1: Write the proportion equation
20,405,654.12 : 28,126,982.08 = 13,788,176.68 : x - Step 2: Convert to fraction form
20,405,654.12/28,126,982.08 = 13,788,176.68/x - Step 3: Cross multiply
20,405,654.12x = 28,126,982.08 × 13,788,176.68 - Step 4: Simplify right side
20,405,654.12x = 387,819,798,394,233.88 - Step 5: Solve for x
x = 387,819,798,394,233.88/20,405,654.12 - Step 6: Final answer
x = 19,005,506.81
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.