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Finding the Fourth Proportional to 25.31, 38.07 and 18.93

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Solution

The fourth proportional to 25.31, 38.07 and 18.93 is: 28.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    25.31 : 38.07 = 18.93 : x
  2. Step 2: Convert to fraction form
    25.31/38.07 = 18.93/x
  3. Step 3: Cross multiply
    25.31x = 38.07 × 18.93
  4. Step 4: Simplify right side
    25.31x = 720.81
  5. Step 5: Solve for x
    x = 720.81/25.31
  6. Step 6: Final answer
    x = 28.48

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