Home / 11,146.58-15,379.17-8,781.38

Finding the Fourth Proportional to 11,146.58, 15,379.17 and 8,781.38

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Solution

The fourth proportional to 11,146.58, 15,379.17 and 8,781.38 is: 12,115.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,146.58 : 15,379.17 = 8,781.38 : x
  2. Step 2: Convert to fraction form
    11,146.58/15,379.17 = 8,781.38/x
  3. Step 3: Cross multiply
    11,146.58x = 15,379.17 × 8,781.38
  4. Step 4: Simplify right side
    11,146.58x = 135,050,335.85
  5. Step 5: Solve for x
    x = 135,050,335.85/11,146.58
  6. Step 6: Final answer
    x = 12,115.85

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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.