Finding the Fourth Proportional to 18,721,208.10, 28,081,812.15 and 15,319,985.70
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Solution
The fourth proportional to 18,721,208.10, 28,081,812.15 and 15,319,985.70 is: 22,979,978.55
Step by Step Solution
- Step 1: Write the proportion equation
18,721,208.10 : 28,081,812.15 = 15,319,985.70 : x - Step 2: Convert to fraction form
18,721,208.10/28,081,812.15 = 15,319,985.70/x - Step 3: Cross multiply
18,721,208.10x = 28,081,812.15 × 15,319,985.70 - Step 4: Simplify right side
18,721,208.10x = 430,212,960,568,086.19 - Step 5: Solve for x
x = 430,212,960,568,086.19/18,721,208.10 - Step 6: Final answer
x = 22,979,978.55
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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.