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Finding the Third Proportional to 15,620 and 18,374

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Solution

The third proportional to 15,620 and 18,374 is: 21,613.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,620 : 18,374 = 18,374 : x
  2. Step 2: Convert to fraction form
    15,620/18,374 = 18,374/x
  3. Step 3: Cross multiply
    15,620x = 18,374 × 18,374
  4. Step 4: Simplify right side
    15,620x = 337,603,876
  5. Step 5: Solve for x
    x = 337,603,876/15,620
  6. Step 6: Final answer
    x = 21,613.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.