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Finding the Fourth Proportional to 18.01, 26.89 and 15.15

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Solution

The fourth proportional to 18.01, 26.89 and 15.15 is: 22.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18.01 : 26.89 = 15.15 : x
  2. Step 2: Convert to fraction form
    18.01/26.89 = 15.15/x
  3. Step 3: Cross multiply
    18.01x = 26.89 × 15.15
  4. Step 4: Simplify right side
    18.01x = 407.38
  5. Step 5: Solve for x
    x = 407.38/18.01
  6. Step 6: Final answer
    x = 22.62

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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.