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Finding the Fourth Proportional to 12.81, 17.59 and 12.14

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Solution

The fourth proportional to 12.81, 17.59 and 12.14 is: 16.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12.81 : 17.59 = 12.14 : x
  2. Step 2: Convert to fraction form
    12.81/17.59 = 12.14/x
  3. Step 3: Cross multiply
    12.81x = 17.59 × 12.14
  4. Step 4: Simplify right side
    12.81x = 213.42
  5. Step 5: Solve for x
    x = 213.42/12.81
  6. Step 6: Final answer
    x = 16.66

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.