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Finding the Fourth Proportional to 31,839.48, 47,752.20 and 20,823.48

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Solution

The fourth proportional to 31,839.48, 47,752.20 and 20,823.48 is: 31,230.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,839.48 : 47,752.20 = 20,823.48 : x
  2. Step 2: Convert to fraction form
    31,839.48/47,752.20 = 20,823.48/x
  3. Step 3: Cross multiply
    31,839.48x = 47,752.20 × 20,823.48
  4. Step 4: Simplify right side
    31,839.48x = 994,366,981.66
  5. Step 5: Solve for x
    x = 994,366,981.66/31,839.48
  6. Step 6: Final answer
    x = 31,230.63

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