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Finding the Third Proportional to 13.70 and 30.48

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Solution

The third proportional to 13.70 and 30.48 is: 67.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13.70 : 30.48 = 30.48 : x
  2. Step 2: Convert to fraction form
    13.70/30.48 = 30.48/x
  3. Step 3: Cross multiply
    13.70x = 30.48 × 30.48
  4. Step 4: Simplify right side
    13.70x = 929.13
  5. Step 5: Solve for x
    x = 929.13/13.70
  6. Step 6: Final answer
    x = 67.82

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Why These Related Problems?

These problems maintain the same ratio (2.22) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.