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Finding the Fourth Proportional to 11,745.01, 17,617.47 and 2,979.90

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Solution

The fourth proportional to 11,745.01, 17,617.47 and 2,979.90 is: 4,469.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,745.01 : 17,617.47 = 2,979.90 : x
  2. Step 2: Convert to fraction form
    11,745.01/17,617.47 = 2,979.90/x
  3. Step 3: Cross multiply
    11,745.01x = 17,617.47 × 2,979.90
  4. Step 4: Simplify right side
    11,745.01x = 52,498,298.85
  5. Step 5: Solve for x
    x = 52,498,298.85/11,745.01
  6. Step 6: Final answer
    x = 4,469.84

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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.