Home / 20,691.31-30,977.13-18,554.73

Finding the Fourth Proportional to 20,691.31, 30,977.13 and 18,554.73

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Solution

The fourth proportional to 20,691.31, 30,977.13 and 18,554.73 is: 27,778.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,691.31 : 30,977.13 = 18,554.73 : x
  2. Step 2: Convert to fraction form
    20,691.31/30,977.13 = 18,554.73/x
  3. Step 3: Cross multiply
    20,691.31x = 30,977.13 × 18,554.73
  4. Step 4: Simplify right side
    20,691.31x = 574,772,190.55
  5. Step 5: Solve for x
    x = 574,772,190.55/20,691.31
  6. Step 6: Final answer
    x = 27,778.43

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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.