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Finding the Fourth Proportional to 11.99, 17.91 and 9.93

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Solution

The fourth proportional to 11.99, 17.91 and 9.93 is: 14.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    11.99 : 17.91 = 9.93 : x
  2. Step 2: Convert to fraction form
    11.99/17.91 = 9.93/x
  3. Step 3: Cross multiply
    11.99x = 17.91 × 9.93
  4. Step 4: Simplify right side
    11.99x = 177.85
  5. Step 5: Solve for x
    x = 177.85/11.99
  6. Step 6: Final answer
    x = 14.83

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.