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Finding the Third Proportional to 12,720 and 16,886

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Solution

The third proportional to 12,720 and 16,886 is: 22,416.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,720 : 16,886 = 16,886 : x
  2. Step 2: Convert to fraction form
    12,720/16,886 = 16,886/x
  3. Step 3: Cross multiply
    12,720x = 16,886 × 16,886
  4. Step 4: Simplify right side
    12,720x = 285,136,996
  5. Step 5: Solve for x
    x = 285,136,996/12,720
  6. Step 6: Final answer
    x = 22,416.43

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1.5x scale

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.