Finding the Fourth Proportional to 20,644,807.38, 28,489,944.96 and 11,352,976.62
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Solution
The fourth proportional to 20,644,807.38, 28,489,944.96 and 11,352,976.62 is: 15,667,168.65
Step by Step Solution
- Step 1: Write the proportion equation
20,644,807.38 : 28,489,944.96 = 11,352,976.62 : x - Step 2: Convert to fraction form
20,644,807.38/28,489,944.96 = 11,352,976.62/x - Step 3: Cross multiply
20,644,807.38x = 28,489,944.96 × 11,352,976.62 - Step 4: Simplify right side
20,644,807.38x = 323,445,679,035,966.81 - Step 5: Solve for x
x = 323,445,679,035,966.81/20,644,807.38 - Step 6: Final answer
x = 15,667,168.65
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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.