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Finding the Fourth Proportional to 3,894.92, 5,375.19 and 2,126.53

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Solution

The fourth proportional to 3,894.92, 5,375.19 and 2,126.53 is: 2,934.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,894.92 : 5,375.19 = 2,126.53 : x
  2. Step 2: Convert to fraction form
    3,894.92/5,375.19 = 2,126.53/x
  3. Step 3: Cross multiply
    3,894.92x = 5,375.19 × 2,126.53
  4. Step 4: Simplify right side
    3,894.92x = 11,430,517.48
  5. Step 5: Solve for x
    x = 11,430,517.48/3,894.92
  6. Step 6: Final answer
    x = 2,934.73

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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.