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Finding the Fourth Proportional to 6,378.18, 8,796 and 3,987.39

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Solution

The fourth proportional to 6,378.18, 8,796 and 3,987.39 is: 5,498.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,378.18 : 8,796 = 3,987.39 : x
  2. Step 2: Convert to fraction form
    6,378.18/8,796 = 3,987.39/x
  3. Step 3: Cross multiply
    6,378.18x = 8,796 × 3,987.39
  4. Step 4: Simplify right side
    6,378.18x = 35,073,082.44
  5. Step 5: Solve for x
    x = 35,073,082.44/6,378.18
  6. Step 6: Final answer
    x = 5,498.92

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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.