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Finding the Third Proportional to 4,010 and 7,420

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Solution

The third proportional to 4,010 and 7,420 is: 13,729.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,010 : 7,420 = 7,420 : x
  2. Step 2: Convert to fraction form
    4,010/7,420 = 7,420/x
  3. Step 3: Cross multiply
    4,010x = 7,420 × 7,420
  4. Step 4: Simplify right side
    4,010x = 55,056,400
  5. Step 5: Solve for x
    x = 55,056,400/4,010
  6. Step 6: Final answer
    x = 13,729.78

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Why These Related Problems?

These problems maintain the same ratio (1.85) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.