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Finding the Fourth Proportional to 8,177.86, 12,258 and 3,240.64

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Solution

The fourth proportional to 8,177.86, 12,258 and 3,240.64 is: 4,857.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,177.86 : 12,258 = 3,240.64 : x
  2. Step 2: Convert to fraction form
    8,177.86/12,258 = 3,240.64/x
  3. Step 3: Cross multiply
    8,177.86x = 12,258 × 3,240.64
  4. Step 4: Simplify right side
    8,177.86x = 39,723,765.12
  5. Step 5: Solve for x
    x = 39,723,765.12/8,177.86
  6. Step 6: Final answer
    x = 4,857.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.