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Finding the Fourth Proportional to 9,939.10, 14,908.65 and 8,815.90

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Solution

The fourth proportional to 9,939.10, 14,908.65 and 8,815.90 is: 13,223.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,939.10 : 14,908.65 = 8,815.90 : x
  2. Step 2: Convert to fraction form
    9,939.10/14,908.65 = 8,815.90/x
  3. Step 3: Cross multiply
    9,939.10x = 14,908.65 × 8,815.90
  4. Step 4: Simplify right side
    9,939.10x = 131,433,167.54
  5. Step 5: Solve for x
    x = 131,433,167.54/9,939.10
  6. Step 6: Final answer
    x = 13,223.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.