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Finding the Fourth Proportional to 10.56, 15.83 and 6.55

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Solution

The fourth proportional to 10.56, 15.83 and 6.55 is: 9.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    10.56 : 15.83 = 6.55 : x
  2. Step 2: Convert to fraction form
    10.56/15.83 = 6.55/x
  3. Step 3: Cross multiply
    10.56x = 15.83 × 6.55
  4. Step 4: Simplify right side
    10.56x = 103.64
  5. Step 5: Solve for x
    x = 103.64/10.56
  6. Step 6: Final answer
    x = 9.81

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