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Finding the Third Proportional to 10,920 and 17,319

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Solution

The third proportional to 10,920 and 17,319 is: 27,467.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,920 : 17,319 = 17,319 : x
  2. Step 2: Convert to fraction form
    10,920/17,319 = 17,319/x
  3. Step 3: Cross multiply
    10,920x = 17,319 × 17,319
  4. Step 4: Simplify right side
    10,920x = 299,947,761
  5. Step 5: Solve for x
    x = 299,947,761/10,920
  6. Step 6: Final answer
    x = 27,467.74

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.