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Finding the Fourth Proportional to 39,801.98, 59,702.79 and 11,722.61

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Solution

The fourth proportional to 39,801.98, 59,702.79 and 11,722.61 is: 17,583.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,801.98 : 59,702.79 = 11,722.61 : x
  2. Step 2: Convert to fraction form
    39,801.98/59,702.79 = 11,722.61/x
  3. Step 3: Cross multiply
    39,801.98x = 59,702.79 × 11,722.61
  4. Step 4: Simplify right side
    39,801.98x = 699,872,523.08
  5. Step 5: Solve for x
    x = 699,872,523.08/39,801.98
  6. Step 6: Final answer
    x = 17,583.86

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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.