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Finding the Fourth Proportional to 20,171.97, 27,835.06 and 12,103.99

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Solution

The fourth proportional to 20,171.97, 27,835.06 and 12,103.99 is: 16,702.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,171.97 : 27,835.06 = 12,103.99 : x
  2. Step 2: Convert to fraction form
    20,171.97/27,835.06 = 12,103.99/x
  3. Step 3: Cross multiply
    20,171.97x = 27,835.06 × 12,103.99
  4. Step 4: Simplify right side
    20,171.97x = 336,915,287.89
  5. Step 5: Solve for x
    x = 336,915,287.89/20,171.97
  6. Step 6: Final answer
    x = 16,702.15

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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.