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Finding the Fourth Proportional to 8,611.11, 11,879.73 and 5,251.23

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Solution

The fourth proportional to 8,611.11, 11,879.73 and 5,251.23 is: 7,244.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,611.11 : 11,879.73 = 5,251.23 : x
  2. Step 2: Convert to fraction form
    8,611.11/11,879.73 = 5,251.23/x
  3. Step 3: Cross multiply
    8,611.11x = 11,879.73 × 5,251.23
  4. Step 4: Simplify right side
    8,611.11x = 62,383,194.57
  5. Step 5: Solve for x
    x = 62,383,194.57/8,611.11
  6. Step 6: Final answer
    x = 7,244.50

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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.