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Finding the Fourth Proportional to 29,272.78, 40,396.42 and 15,843.99

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Solution

The fourth proportional to 29,272.78, 40,396.42 and 15,843.99 is: 21,864.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,272.78 : 40,396.42 = 15,843.99 : x
  2. Step 2: Convert to fraction form
    29,272.78/40,396.42 = 15,843.99/x
  3. Step 3: Cross multiply
    29,272.78x = 40,396.42 × 15,843.99
  4. Step 4: Simplify right side
    29,272.78x = 640,040,474.52
  5. Step 5: Solve for x
    x = 640,040,474.52/29,272.78
  6. Step 6: Final answer
    x = 21,864.70

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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.