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Finding the Fourth Proportional to 13,869.05, 20,785.70 and 12,082.88

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Solution

The fourth proportional to 13,869.05, 20,785.70 and 12,082.88 is: 18,108.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,869.05 : 20,785.70 = 12,082.88 : x
  2. Step 2: Convert to fraction form
    13,869.05/20,785.70 = 12,082.88/x
  3. Step 3: Cross multiply
    13,869.05x = 20,785.70 × 12,082.88
  4. Step 4: Simplify right side
    13,869.05x = 251,151,200.99
  5. Step 5: Solve for x
    x = 251,151,200.99/13,869.05
  6. Step 6: Final answer
    x = 18,108.76

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