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Finding the Fourth Proportional to 13,691.82, 20,540.82 and 4,926.78

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Solution

The fourth proportional to 13,691.82, 20,540.82 and 4,926.78 is: 7,391.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,691.82 : 20,540.82 = 4,926.78 : x
  2. Step 2: Convert to fraction form
    13,691.82/20,540.82 = 4,926.78/x
  3. Step 3: Cross multiply
    13,691.82x = 20,540.82 × 4,926.78
  4. Step 4: Simplify right side
    13,691.82x = 101,200,101.16
  5. Step 5: Solve for x
    x = 101,200,101.16/13,691.82
  6. Step 6: Final answer
    x = 7,391.28

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1.5x scale

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.