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Finding the Fourth Proportional to 13.94, 20.85 and 9.92

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Solution

The fourth proportional to 13.94, 20.85 and 9.92 is: 14.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13.94 : 20.85 = 9.92 : x
  2. Step 2: Convert to fraction form
    13.94/20.85 = 9.92/x
  3. Step 3: Cross multiply
    13.94x = 20.85 × 9.92
  4. Step 4: Simplify right side
    13.94x = 206.83
  5. Step 5: Solve for x
    x = 206.83/13.94
  6. Step 6: Final answer
    x = 14.84

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