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Finding the Fourth Proportional to 28,957, 39,960.66 and 16,381.48

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Solution

The fourth proportional to 28,957, 39,960.66 and 16,381.48 is: 22,606.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,957 : 39,960.66 = 16,381.48 : x
  2. Step 2: Convert to fraction form
    28,957/39,960.66 = 16,381.48/x
  3. Step 3: Cross multiply
    28,957x = 39,960.66 × 16,381.48
  4. Step 4: Simplify right side
    28,957x = 654,614,752.58
  5. Step 5: Solve for x
    x = 654,614,752.58/28,957
  6. Step 6: Final answer
    x = 22,606.44

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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.