Home / 20,654.31-30,904.92-12,338.85

Finding the Fourth Proportional to 20,654.31, 30,904.92 and 12,338.85

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Solution

The fourth proportional to 20,654.31, 30,904.92 and 12,338.85 is: 18,462.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,654.31 : 30,904.92 = 12,338.85 : x
  2. Step 2: Convert to fraction form
    20,654.31/30,904.92 = 12,338.85/x
  3. Step 3: Cross multiply
    20,654.31x = 30,904.92 × 12,338.85
  4. Step 4: Simplify right side
    20,654.31x = 381,331,172.14
  5. Step 5: Solve for x
    x = 381,331,172.14/20,654.31
  6. Step 6: Final answer
    x = 18,462.55

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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.