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Finding the Fourth Proportional to 10.15, 13.98 and 9.94

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Solution

The fourth proportional to 10.15, 13.98 and 9.94 is: 13.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    10.15 : 13.98 = 9.94 : x
  2. Step 2: Convert to fraction form
    10.15/13.98 = 9.94/x
  3. Step 3: Cross multiply
    10.15x = 13.98 × 9.94
  4. Step 4: Simplify right side
    10.15x = 138.96
  5. Step 5: Solve for x
    x = 138.96/10.15
  6. Step 6: Final answer
    x = 13.69

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