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Finding the Fourth Proportional to 14,691.20, 20,273.88 and 7,976.84

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Solution

The fourth proportional to 14,691.20, 20,273.88 and 7,976.84 is: 11,008.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,691.20 : 20,273.88 = 7,976.84 : x
  2. Step 2: Convert to fraction form
    14,691.20/20,273.88 = 7,976.84/x
  3. Step 3: Cross multiply
    14,691.20x = 20,273.88 × 7,976.84
  4. Step 4: Simplify right side
    14,691.20x = 161,721,496.94
  5. Step 5: Solve for x
    x = 161,721,496.94/14,691.20
  6. Step 6: Final answer
    x = 11,008.05

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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.