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Finding the Fourth Proportional to 28,753.17, 39,682.07 and 16,815.79

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Solution

The fourth proportional to 28,753.17, 39,682.07 and 16,815.79 is: 23,207.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,753.17 : 39,682.07 = 16,815.79 : x
  2. Step 2: Convert to fraction form
    28,753.17/39,682.07 = 16,815.79/x
  3. Step 3: Cross multiply
    28,753.17x = 39,682.07 × 16,815.79
  4. Step 4: Simplify right side
    28,753.17x = 667,285,355.89
  5. Step 5: Solve for x
    x = 667,285,355.89/28,753.17
  6. Step 6: Final answer
    x = 23,207.37

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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.