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Finding the Fourth Proportional to 15.74, 23.59 and 11.91

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Solution

The fourth proportional to 15.74, 23.59 and 11.91 is: 17.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15.74 : 23.59 = 11.91 : x
  2. Step 2: Convert to fraction form
    15.74/23.59 = 11.91/x
  3. Step 3: Cross multiply
    15.74x = 23.59 × 11.91
  4. Step 4: Simplify right side
    15.74x = 280.96
  5. Step 5: Solve for x
    x = 280.96/15.74
  6. Step 6: Final answer
    x = 17.85

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