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Finding the Fourth Proportional to 17,879.30, 26,819.55 and 6,791.21

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Solution

The fourth proportional to 17,879.30, 26,819.55 and 6,791.21 is: 10,187.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,879.30 : 26,819.55 = 6,791.21 : x
  2. Step 2: Convert to fraction form
    17,879.30/26,819.55 = 6,791.21/x
  3. Step 3: Cross multiply
    17,879.30x = 26,819.55 × 6,791.21
  4. Step 4: Simplify right side
    17,879.30x = 182,137,196.16
  5. Step 5: Solve for x
    x = 182,137,196.16/17,879.30
  6. Step 6: Final answer
    x = 10,187.04

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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.