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Finding the Fourth Proportional to 12,879.26, 17,773.55 and 8,400.44

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Solution

The fourth proportional to 12,879.26, 17,773.55 and 8,400.44 is: 11,592.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,879.26 : 17,773.55 = 8,400.44 : x
  2. Step 2: Convert to fraction form
    12,879.26/17,773.55 = 8,400.44/x
  3. Step 3: Cross multiply
    12,879.26x = 17,773.55 × 8,400.44
  4. Step 4: Simplify right side
    12,879.26x = 149,305,621.57
  5. Step 5: Solve for x
    x = 149,305,621.57/12,879.26
  6. Step 6: Final answer
    x = 11,592.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.