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Finding the Fourth Proportional to 8,238.66, 12,359.54 and 3,308.68

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Solution

The fourth proportional to 8,238.66, 12,359.54 and 3,308.68 is: 4,963.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,238.66 : 12,359.54 = 3,308.68 : x
  2. Step 2: Convert to fraction form
    8,238.66/12,359.54 = 3,308.68/x
  3. Step 3: Cross multiply
    8,238.66x = 12,359.54 × 3,308.68
  4. Step 4: Simplify right side
    8,238.66x = 40,893,786.53
  5. Step 5: Solve for x
    x = 40,893,786.53/8,238.66
  6. Step 6: Final answer
    x = 4,963.65

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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.