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Finding the Third Proportional to 9.19 and 13.28

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Solution

The third proportional to 9.19 and 13.28 is: 19.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    9.19 : 13.28 = 13.28 : x
  2. Step 2: Convert to fraction form
    9.19/13.28 = 13.28/x
  3. Step 3: Cross multiply
    9.19x = 13.28 × 13.28
  4. Step 4: Simplify right side
    9.19x = 176.39
  5. Step 5: Solve for x
    x = 176.39/9.19
  6. Step 6: Final answer
    x = 19.20

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Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.