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Finding the Fourth Proportional to 20,442.78, 30,641.13 and 10,061.82

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Solution

The fourth proportional to 20,442.78, 30,641.13 and 10,061.82 is: 15,081.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,442.78 : 30,641.13 = 10,061.82 : x
  2. Step 2: Convert to fraction form
    20,442.78/30,641.13 = 10,061.82/x
  3. Step 3: Cross multiply
    20,442.78x = 30,641.13 × 10,061.82
  4. Step 4: Simplify right side
    20,442.78x = 308,305,534.66
  5. Step 5: Solve for x
    x = 308,305,534.66/20,442.78
  6. Step 6: Final answer
    x = 15,081.39

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.