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Finding the Fourth Proportional to 29,338.86, 40,486.50 and 15,909.87

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Solution

The fourth proportional to 29,338.86, 40,486.50 and 15,909.87 is: 21,955.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,338.86 : 40,486.50 = 15,909.87 : x
  2. Step 2: Convert to fraction form
    29,338.86/40,486.50 = 15,909.87/x
  3. Step 3: Cross multiply
    29,338.86x = 40,486.50 × 15,909.87
  4. Step 4: Simplify right side
    29,338.86x = 644,134,951.76
  5. Step 5: Solve for x
    x = 644,134,951.76/29,338.86
  6. Step 6: Final answer
    x = 21,955.01

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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.