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Finding the Fourth Proportional to 12.59, 18.90 and 11.88

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Solution

The fourth proportional to 12.59, 18.90 and 11.88 is: 17.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    12.59 : 18.90 = 11.88 : x
  2. Step 2: Convert to fraction form
    12.59/18.90 = 11.88/x
  3. Step 3: Cross multiply
    12.59x = 18.90 × 11.88
  4. Step 4: Simplify right side
    12.59x = 224.53
  5. Step 5: Solve for x
    x = 224.53/12.59
  6. Step 6: Final answer
    x = 17.84

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