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Finding the Third Proportional to 18.69 and 26.81

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Solution

The third proportional to 18.69 and 26.81 is: 38.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18.69 : 26.81 = 26.81 : x
  2. Step 2: Convert to fraction form
    18.69/26.81 = 26.81/x
  3. Step 3: Cross multiply
    18.69x = 26.81 × 26.81
  4. Step 4: Simplify right side
    18.69x = 718.91
  5. Step 5: Solve for x
    x = 718.91/18.69
  6. Step 6: Final answer
    x = 38.47

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.