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Finding the Third Proportional to 12.09 and 18.98

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Solution

The third proportional to 12.09 and 18.98 is: 29.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12.09 : 18.98 = 18.98 : x
  2. Step 2: Convert to fraction form
    12.09/18.98 = 18.98/x
  3. Step 3: Cross multiply
    12.09x = 18.98 × 18.98
  4. Step 4: Simplify right side
    12.09x = 360.41
  5. Step 5: Solve for x
    x = 360.41/12.09
  6. Step 6: Final answer
    x = 29.80

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.