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Finding the Third Proportional to 28,908 and 31,176

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Solution

The third proportional to 28,908 and 31,176 is: 33,621.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,908 : 31,176 = 31,176 : x
  2. Step 2: Convert to fraction form
    28,908/31,176 = 31,176/x
  3. Step 3: Cross multiply
    28,908x = 31,176 × 31,176
  4. Step 4: Simplify right side
    28,908x = 971,942,976
  5. Step 5: Solve for x
    x = 971,942,976/28,908
  6. Step 6: Final answer
    x = 33,621.94

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Why These Related Problems?

These problems maintain the same ratio (1.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.