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Finding the Fourth Proportional to 15,065.23, 20,789.97 and 8,691.73

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Solution

The fourth proportional to 15,065.23, 20,789.97 and 8,691.73 is: 11,994.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,065.23 : 20,789.97 = 8,691.73 : x
  2. Step 2: Convert to fraction form
    15,065.23/20,789.97 = 8,691.73/x
  3. Step 3: Cross multiply
    15,065.23x = 20,789.97 × 8,691.73
  4. Step 4: Simplify right side
    15,065.23x = 180,700,805.95
  5. Step 5: Solve for x
    x = 180,700,805.95/15,065.23
  6. Step 6: Final answer
    x = 11,994.56

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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.