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Finding the Fourth Proportional to 18.73, 28.19 and 14.25

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Solution

The fourth proportional to 18.73, 28.19 and 14.25 is: 21.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18.73 : 28.19 = 14.25 : x
  2. Step 2: Convert to fraction form
    18.73/28.19 = 14.25/x
  3. Step 3: Cross multiply
    18.73x = 28.19 × 14.25
  4. Step 4: Simplify right side
    18.73x = 401.71
  5. Step 5: Solve for x
    x = 401.71/18.73
  6. Step 6: Final answer
    x = 21.45

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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.