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Finding the Third Proportional to 9,980 and 15,655

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Solution

The third proportional to 9,980 and 15,655 is: 24,557.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,980 : 15,655 = 15,655 : x
  2. Step 2: Convert to fraction form
    9,980/15,655 = 15,655/x
  3. Step 3: Cross multiply
    9,980x = 15,655 × 15,655
  4. Step 4: Simplify right side
    9,980x = 245,079,025
  5. Step 5: Solve for x
    x = 245,079,025/9,980
  6. Step 6: Final answer
    x = 24,557.02

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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.