Home / 20,976.30-31,398.84-15,680.52

Finding the Fourth Proportional to 20,976.30, 31,398.84 and 15,680.52

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Solution

The fourth proportional to 20,976.30, 31,398.84 and 15,680.52 is: 23,471.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,976.30 : 31,398.84 = 15,680.52 : x
  2. Step 2: Convert to fraction form
    20,976.30/31,398.84 = 15,680.52/x
  3. Step 3: Cross multiply
    20,976.30x = 31,398.84 × 15,680.52
  4. Step 4: Simplify right side
    20,976.30x = 492,350,138.60
  5. Step 5: Solve for x
    x = 492,350,138.60/20,976.30
  6. Step 6: Final answer
    x = 23,471.73

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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.