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Finding the Fourth Proportional to 19.11, 26.38 and 14.47

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Solution

The fourth proportional to 19.11, 26.38 and 14.47 is: 19.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    19.11 : 26.38 = 14.47 : x
  2. Step 2: Convert to fraction form
    19.11/26.38 = 14.47/x
  3. Step 3: Cross multiply
    19.11x = 26.38 × 14.47
  4. Step 4: Simplify right side
    19.11x = 381.59
  5. Step 5: Solve for x
    x = 381.59/19.11
  6. Step 6: Final answer
    x = 19.97

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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.