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Finding the Fourth Proportional to 20,864.70, 31,293.81 and 6,824.61

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Solution

The fourth proportional to 20,864.70, 31,293.81 and 6,824.61 is: 10,235.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,864.70 : 31,293.81 = 6,824.61 : x
  2. Step 2: Convert to fraction form
    20,864.70/31,293.81 = 6,824.61/x
  3. Step 3: Cross multiply
    20,864.70x = 31,293.81 × 6,824.61
  4. Step 4: Simplify right side
    20,864.70x = 213,568,048.66
  5. Step 5: Solve for x
    x = 213,568,048.66/20,864.70
  6. Step 6: Final answer
    x = 10,235.86

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