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Finding the Fourth Proportional to 14,691.25, 20,273.95 and 7,976.78

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Solution

The fourth proportional to 14,691.25, 20,273.95 and 7,976.78 is: 11,007.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,691.25 : 20,273.95 = 7,976.78 : x
  2. Step 2: Convert to fraction form
    14,691.25/20,273.95 = 7,976.78/x
  3. Step 3: Cross multiply
    14,691.25x = 20,273.95 × 7,976.78
  4. Step 4: Simplify right side
    14,691.25x = 161,720,778.64
  5. Step 5: Solve for x
    x = 161,720,778.64/14,691.25
  6. Step 6: Final answer
    x = 11,007.97

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1.5x scale

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.