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Finding the Fourth Proportional to 6,615.97, 9,129.78 and 3,631.73

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Solution

The fourth proportional to 6,615.97, 9,129.78 and 3,631.73 is: 5,011.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,615.97 : 9,129.78 = 3,631.73 : x
  2. Step 2: Convert to fraction form
    6,615.97/9,129.78 = 3,631.73/x
  3. Step 3: Cross multiply
    6,615.97x = 9,129.78 × 3,631.73
  4. Step 4: Simplify right side
    6,615.97x = 33,156,850.27
  5. Step 5: Solve for x
    x = 33,156,850.27/6,615.97
  6. Step 6: Final answer
    x = 5,011.64

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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.