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Finding the Fourth Proportional to 19.92, 27.47 and 14.09

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Solution

The fourth proportional to 19.92, 27.47 and 14.09 is: 19.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    19.92 : 27.47 = 14.09 : x
  2. Step 2: Convert to fraction form
    19.92/27.47 = 14.09/x
  3. Step 3: Cross multiply
    19.92x = 27.47 × 14.09
  4. Step 4: Simplify right side
    19.92x = 386.91
  5. Step 5: Solve for x
    x = 386.91/19.92
  6. Step 6: Final answer
    x = 19.43

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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.