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Finding the Third Proportional to 8,000 and 12,540

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Solution

The third proportional to 8,000 and 12,540 is: 19,656.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,000 : 12,540 = 12,540 : x
  2. Step 2: Convert to fraction form
    8,000/12,540 = 12,540/x
  3. Step 3: Cross multiply
    8,000x = 12,540 × 12,540
  4. Step 4: Simplify right side
    8,000x = 157,251,600
  5. Step 5: Solve for x
    x = 157,251,600/8,000
  6. Step 6: Final answer
    x = 19,656.45

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.