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Finding the Fourth Proportional to 27,139.68, 40,708.08 and 8,671.68

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Solution

The fourth proportional to 27,139.68, 40,708.08 and 8,671.68 is: 13,007.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,139.68 : 40,708.08 = 8,671.68 : x
  2. Step 2: Convert to fraction form
    27,139.68/40,708.08 = 8,671.68/x
  3. Step 3: Cross multiply
    27,139.68x = 40,708.08 × 8,671.68
  4. Step 4: Simplify right side
    27,139.68x = 353,007,443.17
  5. Step 5: Solve for x
    x = 353,007,443.17/27,139.68
  6. Step 6: Final answer
    x = 13,007.06

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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.