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Finding the Fourth Proportional to 6,381, 8,805.87 and 3,897

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Solution

The fourth proportional to 6,381, 8,805.87 and 3,897 is: 5,377.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,381 : 8,805.87 = 3,897 : x
  2. Step 2: Convert to fraction form
    6,381/8,805.87 = 3,897/x
  3. Step 3: Cross multiply
    6,381x = 8,805.87 × 3,897
  4. Step 4: Simplify right side
    6,381x = 34,316,475.39
  5. Step 5: Solve for x
    x = 34,316,475.39/6,381
  6. Step 6: Final answer
    x = 5,377.91

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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.