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Finding the Third Proportional to 5,620 and 7,456

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Solution

The third proportional to 5,620 and 7,456 is: 9,891.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,620 : 7,456 = 7,456 : x
  2. Step 2: Convert to fraction form
    5,620/7,456 = 7,456/x
  3. Step 3: Cross multiply
    5,620x = 7,456 × 7,456
  4. Step 4: Simplify right side
    5,620x = 55,591,936
  5. Step 5: Solve for x
    x = 55,591,936/5,620
  6. Step 6: Final answer
    x = 9,891.80

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.