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Finding the Fourth Proportional to 20,273.12, 27,977.12 and 11,889.76

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Solution

The fourth proportional to 20,273.12, 27,977.12 and 11,889.76 is: 16,407.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,273.12 : 27,977.12 = 11,889.76 : x
  2. Step 2: Convert to fraction form
    20,273.12/27,977.12 = 11,889.76/x
  3. Step 3: Cross multiply
    20,273.12x = 27,977.12 × 11,889.76
  4. Step 4: Simplify right side
    20,273.12x = 332,641,242.29
  5. Step 5: Solve for x
    x = 332,641,242.29/20,273.12
  6. Step 6: Final answer
    x = 16,407.99

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