Finding the Fourth Proportional to 20,654,605.11, 28,503,197.39 and 11,361,975.09
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Solution
The fourth proportional to 20,654,605.11, 28,503,197.39 and 11,361,975.09 is: 15,679,438.90
Step by Step Solution
- Step 1: Write the proportion equation
20,654,605.11 : 28,503,197.39 = 11,361,975.09 : x - Step 2: Convert to fraction form
20,654,605.11/28,503,197.39 = 11,361,975.09/x - Step 3: Cross multiply
20,654,605.11x = 28,503,197.39 × 11,361,975.09 - Step 4: Simplify right side
20,654,605.11x = 323,852,618,730,533 - Step 5: Solve for x
x = 323,852,618,730,533/20,654,605.11 - Step 6: Final answer
x = 15,679,438.90
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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.