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Finding the Fourth Proportional to 18.33, 25.25 and 14.21

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Solution

The fourth proportional to 18.33, 25.25 and 14.21 is: 19.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18.33 : 25.25 = 14.21 : x
  2. Step 2: Convert to fraction form
    18.33/25.25 = 14.21/x
  3. Step 3: Cross multiply
    18.33x = 25.25 × 14.21
  4. Step 4: Simplify right side
    18.33x = 358.80
  5. Step 5: Solve for x
    x = 358.80/18.33
  6. Step 6: Final answer
    x = 19.57

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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.