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Finding the Third Proportional to 7,860 and 10,686

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Solution

The third proportional to 7,860 and 10,686 is: 14,528.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,860 : 10,686 = 10,686 : x
  2. Step 2: Convert to fraction form
    7,860/10,686 = 10,686/x
  3. Step 3: Cross multiply
    7,860x = 10,686 × 10,686
  4. Step 4: Simplify right side
    7,860x = 114,190,596
  5. Step 5: Solve for x
    x = 114,190,596/7,860
  6. Step 6: Final answer
    x = 14,528.07

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.