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Finding the Fourth Proportional to 28,810, 39,757.80 and 16,235.20

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Solution

The fourth proportional to 28,810, 39,757.80 and 16,235.20 is: 22,404.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,810 : 39,757.80 = 16,235.20 : x
  2. Step 2: Convert to fraction form
    28,810/39,757.80 = 16,235.20/x
  3. Step 3: Cross multiply
    28,810x = 39,757.80 × 16,235.20
  4. Step 4: Simplify right side
    28,810x = 645,475,834.56
  5. Step 5: Solve for x
    x = 645,475,834.56/28,810
  6. Step 6: Final answer
    x = 22,404.58

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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.