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Finding the Fourth Proportional to 19.91, 27.48 and 13.44

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Solution

The fourth proportional to 19.91, 27.48 and 13.44 is: 18.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    19.91 : 27.48 = 13.44 : x
  2. Step 2: Convert to fraction form
    19.91/27.48 = 13.44/x
  3. Step 3: Cross multiply
    19.91x = 27.48 × 13.44
  4. Step 4: Simplify right side
    19.91x = 369.33
  5. Step 5: Solve for x
    x = 369.33/19.91
  6. Step 6: Final answer
    x = 18.55

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