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Finding the Fourth Proportional to 29,339.87, 40,489.05 and 15,911.13

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Solution

The fourth proportional to 29,339.87, 40,489.05 and 15,911.13 is: 21,957.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,339.87 : 40,489.05 = 15,911.13 : x
  2. Step 2: Convert to fraction form
    29,339.87/40,489.05 = 15,911.13/x
  3. Step 3: Cross multiply
    29,339.87x = 40,489.05 × 15,911.13
  4. Step 4: Simplify right side
    29,339.87x = 644,226,538.13
  5. Step 5: Solve for x
    x = 644,226,538.13/29,339.87
  6. Step 6: Final answer
    x = 21,957.38

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1.5x scale

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.