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Finding the Fourth Proportional to 40,411.87, 60,578.93 and 20,699.71

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Solution

The fourth proportional to 40,411.87, 60,578.93 and 20,699.71 is: 31,029.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,411.87 : 60,578.93 = 20,699.71 : x
  2. Step 2: Convert to fraction form
    40,411.87/60,578.93 = 20,699.71/x
  3. Step 3: Cross multiply
    40,411.87x = 60,578.93 × 20,699.71
  4. Step 4: Simplify right side
    40,411.87x = 1,253,966,179.61
  5. Step 5: Solve for x
    x = 1,253,966,179.61/40,411.87
  6. Step 6: Final answer
    x = 31,029.65

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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.