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Finding the Fourth Proportional to 6,402.85, 8,836.80 and 3,751.31

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Solution

The fourth proportional to 6,402.85, 8,836.80 and 3,751.31 is: 5,177.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,402.85 : 8,836.80 = 3,751.31 : x
  2. Step 2: Convert to fraction form
    6,402.85/8,836.80 = 3,751.31/x
  3. Step 3: Cross multiply
    6,402.85x = 8,836.80 × 3,751.31
  4. Step 4: Simplify right side
    6,402.85x = 33,149,584.23
  5. Step 5: Solve for x
    x = 33,149,584.23/6,402.85
  6. Step 6: Final answer
    x = 5,177.32

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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.