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Finding the Third Proportional to 10,980 and 15,330

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Solution

The third proportional to 10,980 and 15,330 is: 21,403.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,980 : 15,330 = 15,330 : x
  2. Step 2: Convert to fraction form
    10,980/15,330 = 15,330/x
  3. Step 3: Cross multiply
    10,980x = 15,330 × 15,330
  4. Step 4: Simplify right side
    10,980x = 235,008,900
  5. Step 5: Solve for x
    x = 235,008,900/10,980
  6. Step 6: Final answer
    x = 21,403.36

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.