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Finding the Fourth Proportional to 14.18, 21.29 and 12.27

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Solution

The fourth proportional to 14.18, 21.29 and 12.27 is: 18.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    14.18 : 21.29 = 12.27 : x
  2. Step 2: Convert to fraction form
    14.18/21.29 = 12.27/x
  3. Step 3: Cross multiply
    14.18x = 21.29 × 12.27
  4. Step 4: Simplify right side
    14.18x = 261.23
  5. Step 5: Solve for x
    x = 261.23/14.18
  6. Step 6: Final answer
    x = 18.42

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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.