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Finding the Third Proportional to 5,686 and 8,711

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Solution

The third proportional to 5,686 and 8,711 is: 13,345.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,686 : 8,711 = 8,711 : x
  2. Step 2: Convert to fraction form
    5,686/8,711 = 8,711/x
  3. Step 3: Cross multiply
    5,686x = 8,711 × 8,711
  4. Step 4: Simplify right side
    5,686x = 75,881,521
  5. Step 5: Solve for x
    x = 75,881,521/5,686
  6. Step 6: Final answer
    x = 13,345.33

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.