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Finding the Fourth Proportional to 13.89, 19.17 and 8.06

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Solution

The fourth proportional to 13.89, 19.17 and 8.06 is: 11.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13.89 : 19.17 = 8.06 : x
  2. Step 2: Convert to fraction form
    13.89/19.17 = 8.06/x
  3. Step 3: Cross multiply
    13.89x = 19.17 × 8.06
  4. Step 4: Simplify right side
    13.89x = 154.55
  5. Step 5: Solve for x
    x = 154.55/13.89
  6. Step 6: Final answer
    x = 11.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.