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Finding the Fourth Proportional to 11,879.73, 17,813.57 and 3,979.44

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Solution

The fourth proportional to 11,879.73, 17,813.57 and 3,979.44 is: 5,967.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,879.73 : 17,813.57 = 3,979.44 : x
  2. Step 2: Convert to fraction form
    11,879.73/17,813.57 = 3,979.44/x
  3. Step 3: Cross multiply
    11,879.73x = 17,813.57 × 3,979.44
  4. Step 4: Simplify right side
    11,879.73x = 70,888,013.10
  5. Step 5: Solve for x
    x = 70,888,013.10/11,879.73
  6. Step 6: Final answer
    x = 5,967.14

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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.