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Finding the Third Proportional to 12,520 and 15,916

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Solution

The third proportional to 12,520 and 15,916 is: 20,233.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,520 : 15,916 = 15,916 : x
  2. Step 2: Convert to fraction form
    12,520/15,916 = 15,916/x
  3. Step 3: Cross multiply
    12,520x = 15,916 × 15,916
  4. Step 4: Simplify right side
    12,520x = 253,319,056
  5. Step 5: Solve for x
    x = 253,319,056/12,520
  6. Step 6: Final answer
    x = 20,233.15

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Why These Related Problems?

These problems maintain the same ratio (1.27) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.