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Finding the Third Proportional to 5,312 and 11,686

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Solution

The third proportional to 5,312 and 11,686 is: 25,708.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,312 : 11,686 = 11,686 : x
  2. Step 2: Convert to fraction form
    5,312/11,686 = 11,686/x
  3. Step 3: Cross multiply
    5,312x = 11,686 × 11,686
  4. Step 4: Simplify right side
    5,312x = 136,562,596
  5. Step 5: Solve for x
    x = 136,562,596/5,312
  6. Step 6: Final answer
    x = 25,708.32

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.