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Finding the Third Proportional to 11.70 and 15.28

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Solution

The third proportional to 11.70 and 15.28 is: 19.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    11.70 : 15.28 = 15.28 : x
  2. Step 2: Convert to fraction form
    11.70/15.28 = 15.28/x
  3. Step 3: Cross multiply
    11.70x = 15.28 × 15.28
  4. Step 4: Simplify right side
    11.70x = 233.47
  5. Step 5: Solve for x
    x = 233.47/11.70
  6. Step 6: Final answer
    x = 19.95

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Why These Related Problems?

These problems maintain the same ratio (1.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.