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Finding the Third Proportional to 7,720 and 16,880

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Solution

The third proportional to 7,720 and 16,880 is: 36,908.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,720 : 16,880 = 16,880 : x
  2. Step 2: Convert to fraction form
    7,720/16,880 = 16,880/x
  3. Step 3: Cross multiply
    7,720x = 16,880 × 16,880
  4. Step 4: Simplify right side
    7,720x = 284,934,400
  5. Step 5: Solve for x
    x = 284,934,400/7,720
  6. Step 6: Final answer
    x = 36,908.60

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.