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Finding the Fourth Proportional to 18.05, 26.87 and 17.28

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Solution

The fourth proportional to 18.05, 26.87 and 17.28 is: 25.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18.05 : 26.87 = 17.28 : x
  2. Step 2: Convert to fraction form
    18.05/26.87 = 17.28/x
  3. Step 3: Cross multiply
    18.05x = 26.87 × 17.28
  4. Step 4: Simplify right side
    18.05x = 464.23
  5. Step 5: Solve for x
    x = 464.23/18.05
  6. Step 6: Final answer
    x = 25.73

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.