Home / 15,937.28-21,992.20-8,862.72

Finding the Fourth Proportional to 15,937.28, 21,992.20 and 8,862.72

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Solution

The fourth proportional to 15,937.28, 21,992.20 and 8,862.72 is: 12,229.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,937.28 : 21,992.20 = 8,862.72 : x
  2. Step 2: Convert to fraction form
    15,937.28/21,992.20 = 8,862.72/x
  3. Step 3: Cross multiply
    15,937.28x = 21,992.20 × 8,862.72
  4. Step 4: Simplify right side
    15,937.28x = 194,910,710.78
  5. Step 5: Solve for x
    x = 194,910,710.78/15,937.28
  6. Step 6: Final answer
    x = 12,229.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.