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Finding the Third Proportional to 15,520 and 22,170

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Solution

The third proportional to 15,520 and 22,170 is: 31,669.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,520 : 22,170 = 22,170 : x
  2. Step 2: Convert to fraction form
    15,520/22,170 = 22,170/x
  3. Step 3: Cross multiply
    15,520x = 22,170 × 22,170
  4. Step 4: Simplify right side
    15,520x = 491,508,900
  5. Step 5: Solve for x
    x = 491,508,900/15,520
  6. Step 6: Final answer
    x = 31,669.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.