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Finding the Fourth Proportional to 14.11, 21.14 and 7.25

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Solution

The fourth proportional to 14.11, 21.14 and 7.25 is: 10.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    14.11 : 21.14 = 7.25 : x
  2. Step 2: Convert to fraction form
    14.11/21.14 = 7.25/x
  3. Step 3: Cross multiply
    14.11x = 21.14 × 7.25
  4. Step 4: Simplify right side
    14.11x = 153.15
  5. Step 5: Solve for x
    x = 153.15/14.11
  6. Step 6: Final answer
    x = 10.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.