Home / 15,765.31-21,757.13-8,691.73

Finding the Fourth Proportional to 15,765.31, 21,757.13 and 8,691.73

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Solution

The fourth proportional to 15,765.31, 21,757.13 and 8,691.73 is: 11,995.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,765.31 : 21,757.13 = 8,691.73 : x
  2. Step 2: Convert to fraction form
    15,765.31/21,757.13 = 8,691.73/x
  3. Step 3: Cross multiply
    15,765.31x = 21,757.13 × 8,691.73
  4. Step 4: Simplify right side
    15,765.31x = 189,107,099.53
  5. Step 5: Solve for x
    x = 189,107,099.53/15,765.31
  6. Step 6: Final answer
    x = 11,995.14

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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.