Home / 20,680.62-28,549.17-12,729.66

Finding the Fourth Proportional to 20,680.62, 28,549.17 and 12,729.66

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Solution

The fourth proportional to 20,680.62, 28,549.17 and 12,729.66 is: 17,573.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,680.62 : 28,549.17 = 12,729.66 : x
  2. Step 2: Convert to fraction form
    20,680.62/28,549.17 = 12,729.66/x
  3. Step 3: Cross multiply
    20,680.62x = 28,549.17 × 12,729.66
  4. Step 4: Simplify right side
    20,680.62x = 363,421,227.38
  5. Step 5: Solve for x
    x = 363,421,227.38/20,680.62
  6. Step 6: Final answer
    x = 17,573.03

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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.