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Finding the Fourth Proportional to 6,378.08, 8,801.96 and 3,860.64

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Solution

The fourth proportional to 6,378.08, 8,801.96 and 3,860.64 is: 5,327.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,378.08 : 8,801.96 = 3,860.64 : x
  2. Step 2: Convert to fraction form
    6,378.08/8,801.96 = 3,860.64/x
  3. Step 3: Cross multiply
    6,378.08x = 8,801.96 × 3,860.64
  4. Step 4: Simplify right side
    6,378.08x = 33,981,179.55
  5. Step 5: Solve for x
    x = 33,981,179.55/6,378.08
  6. Step 6: Final answer
    x = 5,327.81

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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.