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Finding the Fourth Proportional to 20.08, 27.72 and 13.96

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Solution

The fourth proportional to 20.08, 27.72 and 13.96 is: 19.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20.08 : 27.72 = 13.96 : x
  2. Step 2: Convert to fraction form
    20.08/27.72 = 13.96/x
  3. Step 3: Cross multiply
    20.08x = 27.72 × 13.96
  4. Step 4: Simplify right side
    20.08x = 386.97
  5. Step 5: Solve for x
    x = 386.97/20.08
  6. Step 6: Final answer
    x = 19.27

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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.