Home / 20,702.24-28,569.20-11,270.88

Finding the Fourth Proportional to 20,702.24, 28,569.20 and 11,270.88

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Solution

The fourth proportional to 20,702.24, 28,569.20 and 11,270.88 is: 15,553.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,702.24 : 28,569.20 = 11,270.88 : x
  2. Step 2: Convert to fraction form
    20,702.24/28,569.20 = 11,270.88/x
  3. Step 3: Cross multiply
    20,702.24x = 28,569.20 × 11,270.88
  4. Step 4: Simplify right side
    20,702.24x = 322,000,024.90
  5. Step 5: Solve for x
    x = 322,000,024.90/20,702.24
  6. Step 6: Final answer
    x = 15,553.87

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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.