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Finding the Third Proportional to 7,212 and 15,685

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Solution

The third proportional to 7,212 and 15,685 is: 34,112.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,212 : 15,685 = 15,685 : x
  2. Step 2: Convert to fraction form
    7,212/15,685 = 15,685/x
  3. Step 3: Cross multiply
    7,212x = 15,685 × 15,685
  4. Step 4: Simplify right side
    7,212x = 246,019,225
  5. Step 5: Solve for x
    x = 246,019,225/7,212
  6. Step 6: Final answer
    x = 34,112.48

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.