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Finding the Fourth Proportional to 12,620.66, 18,931.28 and 6,039.61

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Solution

The fourth proportional to 12,620.66, 18,931.28 and 6,039.61 is: 9,059.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,620.66 : 18,931.28 = 6,039.61 : x
  2. Step 2: Convert to fraction form
    12,620.66/18,931.28 = 6,039.61/x
  3. Step 3: Cross multiply
    12,620.66x = 18,931.28 × 6,039.61
  4. Step 4: Simplify right side
    12,620.66x = 114,337,470.47
  5. Step 5: Solve for x
    x = 114,337,470.47/12,620.66
  6. Step 6: Final answer
    x = 9,059.55

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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.