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Finding the Fourth Proportional to 15.81, 23.73 and 14.55

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Solution

The fourth proportional to 15.81, 23.73 and 14.55 is: 21.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15.81 : 23.73 = 14.55 : x
  2. Step 2: Convert to fraction form
    15.81/23.73 = 14.55/x
  3. Step 3: Cross multiply
    15.81x = 23.73 × 14.55
  4. Step 4: Simplify right side
    15.81x = 345.27
  5. Step 5: Solve for x
    x = 345.27/15.81
  6. Step 6: Final answer
    x = 21.84

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