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Finding the Fourth Proportional to 13,359.78, 20,042.64 and 3,999.42

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Solution

The fourth proportional to 13,359.78, 20,042.64 and 3,999.42 is: 6,000.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,359.78 : 20,042.64 = 3,999.42 : x
  2. Step 2: Convert to fraction form
    13,359.78/20,042.64 = 3,999.42/x
  3. Step 3: Cross multiply
    13,359.78x = 20,042.64 × 3,999.42
  4. Step 4: Simplify right side
    13,359.78x = 80,158,935.27
  5. Step 5: Solve for x
    x = 80,158,935.27/13,359.78
  6. Step 6: Final answer
    x = 6,000.02

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