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Finding the Fourth Proportional to 28,310, 39,067.80 and 15,737.24

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Solution

The fourth proportional to 28,310, 39,067.80 and 15,737.24 is: 21,717.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,310 : 39,067.80 = 15,737.24 : x
  2. Step 2: Convert to fraction form
    28,310/39,067.80 = 15,737.24/x
  3. Step 3: Cross multiply
    28,310x = 39,067.80 × 15,737.24
  4. Step 4: Simplify right side
    28,310x = 614,819,344.87
  5. Step 5: Solve for x
    x = 614,819,344.87/28,310
  6. Step 6: Final answer
    x = 21,717.39

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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.