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Finding the Fourth Proportional to 18,640.70, 25,724.43 and 10,143.08

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Solution

The fourth proportional to 18,640.70, 25,724.43 and 10,143.08 is: 13,997.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,640.70 : 25,724.43 = 10,143.08 : x
  2. Step 2: Convert to fraction form
    18,640.70/25,724.43 = 10,143.08/x
  3. Step 3: Cross multiply
    18,640.70x = 25,724.43 × 10,143.08
  4. Step 4: Simplify right side
    18,640.70x = 260,924,951.44
  5. Step 5: Solve for x
    x = 260,924,951.44/18,640.70
  6. Step 6: Final answer
    x = 13,997.59

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