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Finding the Fourth Proportional to 31,914.90, 47,892.18 and 12,195.42

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Solution

The fourth proportional to 31,914.90, 47,892.18 and 12,195.42 is: 18,300.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,914.90 : 47,892.18 = 12,195.42 : x
  2. Step 2: Convert to fraction form
    31,914.90/47,892.18 = 12,195.42/x
  3. Step 3: Cross multiply
    31,914.90x = 47,892.18 × 12,195.42
  4. Step 4: Simplify right side
    31,914.90x = 584,065,249.82
  5. Step 5: Solve for x
    x = 584,065,249.82/31,914.90
  6. Step 6: Final answer
    x = 18,300.71

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