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Finding the Fourth Proportional to 8,112.75, 12,169.14 and 2,640.75

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Solution

The fourth proportional to 8,112.75, 12,169.14 and 2,640.75 is: 3,961.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,112.75 : 12,169.14 = 2,640.75 : x
  2. Step 2: Convert to fraction form
    8,112.75/12,169.14 = 2,640.75/x
  3. Step 3: Cross multiply
    8,112.75x = 12,169.14 × 2,640.75
  4. Step 4: Simplify right side
    8,112.75x = 32,135,656.46
  5. Step 5: Solve for x
    x = 32,135,656.46/8,112.75
  6. Step 6: Final answer
    x = 3,961.13

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