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Finding the Third Proportional to 13.38 and 19.63

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Solution

The third proportional to 13.38 and 19.63 is: 28.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13.38 : 19.63 = 19.63 : x
  2. Step 2: Convert to fraction form
    13.38/19.63 = 19.63/x
  3. Step 3: Cross multiply
    13.38x = 19.63 × 19.63
  4. Step 4: Simplify right side
    13.38x = 385.14
  5. Step 5: Solve for x
    x = 385.14/13.38
  6. Step 6: Final answer
    x = 28.80

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.