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Finding the Third Proportional to 10,920 and 14,638

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Solution

The third proportional to 10,920 and 14,638 is: 19,621.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,920 : 14,638 = 14,638 : x
  2. Step 2: Convert to fraction form
    10,920/14,638 = 14,638/x
  3. Step 3: Cross multiply
    10,920x = 14,638 × 14,638
  4. Step 4: Simplify right side
    10,920x = 214,271,044
  5. Step 5: Solve for x
    x = 214,271,044/10,920
  6. Step 6: Final answer
    x = 19,621.89

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Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.