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Finding the Fourth Proportional to 11.99, 18 and 10.10

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Solution

The fourth proportional to 11.99, 18 and 10.10 is: 15.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    11.99 : 18 = 10.10 : x
  2. Step 2: Convert to fraction form
    11.99/18 = 10.10/x
  3. Step 3: Cross multiply
    11.99x = 18 × 10.10
  4. Step 4: Simplify right side
    11.99x = 181.80
  5. Step 5: Solve for x
    x = 181.80/11.99
  6. Step 6: Final answer
    x = 15.16

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