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Finding the Fourth Proportional to 13,490.28, 20,205.99 and 11,123.73

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Solution

The fourth proportional to 13,490.28, 20,205.99 and 11,123.73 is: 16,661.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,490.28 : 20,205.99 = 11,123.73 : x
  2. Step 2: Convert to fraction form
    13,490.28/20,205.99 = 11,123.73/x
  3. Step 3: Cross multiply
    13,490.28x = 20,205.99 × 11,123.73
  4. Step 4: Simplify right side
    13,490.28x = 224,765,977.14
  5. Step 5: Solve for x
    x = 224,765,977.14/13,490.28
  6. Step 6: Final answer
    x = 16,661.33

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