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Finding the Third Proportional to 11,686 and 15,746

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Solution

The third proportional to 11,686 and 15,746 is: 21,216.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,686 : 15,746 = 15,746 : x
  2. Step 2: Convert to fraction form
    11,686/15,746 = 15,746/x
  3. Step 3: Cross multiply
    11,686x = 15,746 × 15,746
  4. Step 4: Simplify right side
    11,686x = 247,936,516
  5. Step 5: Solve for x
    x = 247,936,516/11,686
  6. Step 6: Final answer
    x = 21,216.54

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.