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Finding the Fourth Proportional to 14.39, 19.82 and 13.74

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Solution

The fourth proportional to 14.39, 19.82 and 13.74 is: 18.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    14.39 : 19.82 = 13.74 : x
  2. Step 2: Convert to fraction form
    14.39/19.82 = 13.74/x
  3. Step 3: Cross multiply
    14.39x = 19.82 × 13.74
  4. Step 4: Simplify right side
    14.39x = 272.25
  5. Step 5: Solve for x
    x = 272.25/14.39
  6. Step 6: Final answer
    x = 18.91

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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.