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Finding the Fourth Proportional to 51.94, 77.92 and 15.86

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Solution

The fourth proportional to 51.94, 77.92 and 15.86 is: 23.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    51.94 : 77.92 = 15.86 : x
  2. Step 2: Convert to fraction form
    51.94/77.92 = 15.86/x
  3. Step 3: Cross multiply
    51.94x = 77.92 × 15.86
  4. Step 4: Simplify right side
    51.94x = 1,235.73
  5. Step 5: Solve for x
    x = 1,235.73/51.94
  6. Step 6: Final answer
    x = 23.79

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