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Finding the Third Proportional to 5,321 and 11,315

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Solution

The third proportional to 5,321 and 11,315 is: 24,061.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,321 : 11,315 = 11,315 : x
  2. Step 2: Convert to fraction form
    5,321/11,315 = 11,315/x
  3. Step 3: Cross multiply
    5,321x = 11,315 × 11,315
  4. Step 4: Simplify right side
    5,321x = 128,029,225
  5. Step 5: Solve for x
    x = 128,029,225/5,321
  6. Step 6: Final answer
    x = 24,061.12

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.