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Finding the Fourth Proportional to 5,691.88, 7,854.59 and 3,173.95

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Solution

The fourth proportional to 5,691.88, 7,854.59 and 3,173.95 is: 4,379.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,691.88 : 7,854.59 = 3,173.95 : x
  2. Step 2: Convert to fraction form
    5,691.88/7,854.59 = 3,173.95/x
  3. Step 3: Cross multiply
    5,691.88x = 7,854.59 × 3,173.95
  4. Step 4: Simplify right side
    5,691.88x = 24,930,093.68
  5. Step 5: Solve for x
    x = 24,930,093.68/5,691.88
  6. Step 6: Final answer
    x = 4,379.94

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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.