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Finding the Fourth Proportional to 12.66, 19.06 and 11.17

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Solution

The fourth proportional to 12.66, 19.06 and 11.17 is: 16.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12.66 : 19.06 = 11.17 : x
  2. Step 2: Convert to fraction form
    12.66/19.06 = 11.17/x
  3. Step 3: Cross multiply
    12.66x = 19.06 × 11.17
  4. Step 4: Simplify right side
    12.66x = 212.90
  5. Step 5: Solve for x
    x = 212.90/12.66
  6. Step 6: Final answer
    x = 16.82

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.