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Finding the Third Proportional to 7,810 and 12,412

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Solution

The third proportional to 7,810 and 12,412 is: 19,725.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,810 : 12,412 = 12,412 : x
  2. Step 2: Convert to fraction form
    7,810/12,412 = 12,412/x
  3. Step 3: Cross multiply
    7,810x = 12,412 × 12,412
  4. Step 4: Simplify right side
    7,810x = 154,057,744
  5. Step 5: Solve for x
    x = 154,057,744/7,810
  6. Step 6: Final answer
    x = 19,725.70

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.