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Finding the Fourth Proportional to 39,898.42, 55,059.14 and 21,995.09

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Solution

The fourth proportional to 39,898.42, 55,059.14 and 21,995.09 is: 30,352.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,898.42 : 55,059.14 = 21,995.09 : x
  2. Step 2: Convert to fraction form
    39,898.42/55,059.14 = 21,995.09/x
  3. Step 3: Cross multiply
    39,898.42x = 55,059.14 × 21,995.09
  4. Step 4: Simplify right side
    39,898.42x = 1,211,031,035.49
  5. Step 5: Solve for x
    x = 1,211,031,035.49/39,898.42
  6. Step 6: Final answer
    x = 30,352.85

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