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Finding the Fourth Proportional to 20,841.92, 31,259.06 and 5,644.78

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Solution

The fourth proportional to 20,841.92, 31,259.06 and 5,644.78 is: 8,466.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,841.92 : 31,259.06 = 5,644.78 : x
  2. Step 2: Convert to fraction form
    20,841.92/31,259.06 = 5,644.78/x
  3. Step 3: Cross multiply
    20,841.92x = 31,259.06 × 5,644.78
  4. Step 4: Simplify right side
    20,841.92x = 176,450,419.30
  5. Step 5: Solve for x
    x = 176,450,419.30/20,841.92
  6. Step 6: Final answer
    x = 8,466.13

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