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Finding the Fourth Proportional to 22.78, 31.49 and 17.92

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Solution

The fourth proportional to 22.78, 31.49 and 17.92 is: 24.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    22.78 : 31.49 = 17.92 : x
  2. Step 2: Convert to fraction form
    22.78/31.49 = 17.92/x
  3. Step 3: Cross multiply
    22.78x = 31.49 × 17.92
  4. Step 4: Simplify right side
    22.78x = 564.30
  5. Step 5: Solve for x
    x = 564.30/22.78
  6. Step 6: Final answer
    x = 24.77

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