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Finding the Third Proportional to 8,860 and 19,420

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Solution

The third proportional to 8,860 and 19,420 is: 42,566.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,860 : 19,420 = 19,420 : x
  2. Step 2: Convert to fraction form
    8,860/19,420 = 19,420/x
  3. Step 3: Cross multiply
    8,860x = 19,420 × 19,420
  4. Step 4: Simplify right side
    8,860x = 377,136,400
  5. Step 5: Solve for x
    x = 377,136,400/8,860
  6. Step 6: Final answer
    x = 42,566.19

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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.