Home / 20,702.17-28,569.10-11,270.80

Finding the Fourth Proportional to 20,702.17, 28,569.10 and 11,270.80

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Solution

The fourth proportional to 20,702.17, 28,569.10 and 11,270.80 is: 15,553.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,702.17 : 28,569.10 = 11,270.80 : x
  2. Step 2: Convert to fraction form
    20,702.17/28,569.10 = 11,270.80/x
  3. Step 3: Cross multiply
    20,702.17x = 28,569.10 × 11,270.80
  4. Step 4: Simplify right side
    20,702.17x = 321,996,612.28
  5. Step 5: Solve for x
    x = 321,996,612.28/20,702.17
  6. Step 6: Final answer
    x = 15,553.76

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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.