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Finding the Fourth Proportional to 18.50, 27.69 and 13.70

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Solution

The fourth proportional to 18.50, 27.69 and 13.70 is: 20.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18.50 : 27.69 = 13.70 : x
  2. Step 2: Convert to fraction form
    18.50/27.69 = 13.70/x
  3. Step 3: Cross multiply
    18.50x = 27.69 × 13.70
  4. Step 4: Simplify right side
    18.50x = 379.35
  5. Step 5: Solve for x
    x = 379.35/18.50
  6. Step 6: Final answer
    x = 20.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.