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Finding the Third Proportional to 11,970.75 and 19,212

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Solution

The third proportional to 11,970.75 and 19,212 is: 30,833.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,970.75 : 19,212 = 19,212 : x
  2. Step 2: Convert to fraction form
    11,970.75/19,212 = 19,212/x
  3. Step 3: Cross multiply
    11,970.75x = 19,212 × 19,212
  4. Step 4: Simplify right side
    11,970.75x = 369,100,944
  5. Step 5: Solve for x
    x = 369,100,944/11,970.75
  6. Step 6: Final answer
    x = 30,833.57

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.