Home / 21,329.90-31,991.20-5,743.88

Finding the Fourth Proportional to 21,329.90, 31,991.20 and 5,743.88

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Solution

The fourth proportional to 21,329.90, 31,991.20 and 5,743.88 is: 8,614.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,329.90 : 31,991.20 = 5,743.88 : x
  2. Step 2: Convert to fraction form
    21,329.90/31,991.20 = 5,743.88/x
  3. Step 3: Cross multiply
    21,329.90x = 31,991.20 × 5,743.88
  4. Step 4: Simplify right side
    21,329.90x = 183,753,439.54
  5. Step 5: Solve for x
    x = 183,753,439.54/21,329.90
  6. Step 6: Final answer
    x = 8,614.83

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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.