Home / 20,793.30-31,189.95-15,872.55

Finding the Fourth Proportional to 20,793.30, 31,189.95 and 15,872.55

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Solution

The fourth proportional to 20,793.30, 31,189.95 and 15,872.55 is: 23,808.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,793.30 : 31,189.95 = 15,872.55 : x
  2. Step 2: Convert to fraction form
    20,793.30/31,189.95 = 15,872.55/x
  3. Step 3: Cross multiply
    20,793.30x = 31,189.95 × 15,872.55
  4. Step 4: Simplify right side
    20,793.30x = 495,064,040.87
  5. Step 5: Solve for x
    x = 495,064,040.87/20,793.30
  6. Step 6: Final answer
    x = 23,808.83

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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.