Home / 21,285.87-31,932.68-8,799.11

Finding the Fourth Proportional to 21,285.87, 31,932.68 and 8,799.11

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Solution

The fourth proportional to 21,285.87, 31,932.68 and 8,799.11 is: 13,200.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,285.87 : 31,932.68 = 8,799.11 : x
  2. Step 2: Convert to fraction form
    21,285.87/31,932.68 = 8,799.11/x
  3. Step 3: Cross multiply
    21,285.87x = 31,932.68 × 8,799.11
  4. Step 4: Simplify right side
    21,285.87x = 280,979,309.12
  5. Step 5: Solve for x
    x = 280,979,309.12/21,285.87
  6. Step 6: Final answer
    x = 13,200.27

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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.