Home / 21,162.30-31,754.25-8,691.90

Finding the Fourth Proportional to 21,162.30, 31,754.25 and 8,691.90

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Solution

The fourth proportional to 21,162.30, 31,754.25 and 8,691.90 is: 13,042.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,162.30 : 31,754.25 = 8,691.90 : x
  2. Step 2: Convert to fraction form
    21,162.30/31,754.25 = 8,691.90/x
  3. Step 3: Cross multiply
    21,162.30x = 31,754.25 × 8,691.90
  4. Step 4: Simplify right side
    21,162.30x = 276,004,765.58
  5. Step 5: Solve for x
    x = 276,004,765.58/21,162.30
  6. Step 6: Final answer
    x = 13,042.29

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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.