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Finding the Third Proportional to 9,870 and 18,660

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Solution

The third proportional to 9,870 and 18,660 is: 35,278.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,870 : 18,660 = 18,660 : x
  2. Step 2: Convert to fraction form
    9,870/18,660 = 18,660/x
  3. Step 3: Cross multiply
    9,870x = 18,660 × 18,660
  4. Step 4: Simplify right side
    9,870x = 348,195,600
  5. Step 5: Solve for x
    x = 348,195,600/9,870
  6. Step 6: Final answer
    x = 35,278.18

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Why These Related Problems?

These problems maintain the same ratio (1.89) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.