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Finding the Fourth Proportional to 29,143, 40,217.36 and 15,895

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Solution

The fourth proportional to 29,143, 40,217.36 and 15,895 is: 21,935.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,143 : 40,217.36 = 15,895 : x
  2. Step 2: Convert to fraction form
    29,143/40,217.36 = 15,895/x
  3. Step 3: Cross multiply
    29,143x = 40,217.36 × 15,895
  4. Step 4: Simplify right side
    29,143x = 639,254,937.20
  5. Step 5: Solve for x
    x = 639,254,937.20/29,143
  6. Step 6: Final answer
    x = 21,935.11

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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.