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Finding the Fourth Proportional to 12.85, 17.74 and 9.62

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Solution

The fourth proportional to 12.85, 17.74 and 9.62 is: 13.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12.85 : 17.74 = 9.62 : x
  2. Step 2: Convert to fraction form
    12.85/17.74 = 9.62/x
  3. Step 3: Cross multiply
    12.85x = 17.74 × 9.62
  4. Step 4: Simplify right side
    12.85x = 170.66
  5. Step 5: Solve for x
    x = 170.66/12.85
  6. Step 6: Final answer
    x = 13.28

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