Finding the Fourth Proportional to 20,490,564.20, 30,747,656.10 and 7,720,233.80
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Solution
The fourth proportional to 20,490,564.20, 30,747,656.10 and 7,720,233.80 is: 11,584,800.28
Step by Step Solution
- Step 1: Write the proportion equation
20,490,564.20 : 30,747,656.10 = 7,720,233.80 : x - Step 2: Convert to fraction form
20,490,564.20/30,747,656.10 = 7,720,233.80/x - Step 3: Cross multiply
20,490,564.20x = 30,747,656.10 × 7,720,233.80 - Step 4: Simplify right side
20,490,564.20x = 237,379,093,893,996.19 - Step 5: Solve for x
x = 237,379,093,893,996.19/20,490,564.20 - Step 6: Final answer
x = 11,584,800.28
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.