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Finding the Fourth Proportional to 26,879.22, 40,318.89 and 8,159.42

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Solution

The fourth proportional to 26,879.22, 40,318.89 and 8,159.42 is: 12,239.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,879.22 : 40,318.89 = 8,159.42 : x
  2. Step 2: Convert to fraction form
    26,879.22/40,318.89 = 8,159.42/x
  3. Step 3: Cross multiply
    26,879.22x = 40,318.89 × 8,159.42
  4. Step 4: Simplify right side
    26,879.22x = 328,978,555.85
  5. Step 5: Solve for x
    x = 328,978,555.85/26,879.22
  6. Step 6: Final answer
    x = 12,239.14

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1.5x scale

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.