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Finding the Fourth Proportional to 34.16, 51.25 and 13.87

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Solution

The fourth proportional to 34.16, 51.25 and 13.87 is: 20.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    34.16 : 51.25 = 13.87 : x
  2. Step 2: Convert to fraction form
    34.16/51.25 = 13.87/x
  3. Step 3: Cross multiply
    34.16x = 51.25 × 13.87
  4. Step 4: Simplify right side
    34.16x = 710.84
  5. Step 5: Solve for x
    x = 710.84/34.16
  6. Step 6: Final answer
    x = 20.81

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