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Finding the Third Proportional to 28,687.50 and 33,021

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Solution

The third proportional to 28,687.50 and 33,021 is: 38,009.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,687.50 : 33,021 = 33,021 : x
  2. Step 2: Convert to fraction form
    28,687.50/33,021 = 33,021/x
  3. Step 3: Cross multiply
    28,687.50x = 33,021 × 33,021
  4. Step 4: Simplify right side
    28,687.50x = 1,090,386,441
  5. Step 5: Solve for x
    x = 1,090,386,441/28,687.50
  6. Step 6: Final answer
    x = 38,009.11

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Why These Related Problems?

These problems maintain the same ratio (1.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.