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Finding the Third Proportional to 8,986.50 and 19,431

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Solution

The third proportional to 8,986.50 and 19,431 is: 42,014.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,986.50 : 19,431 = 19,431 : x
  2. Step 2: Convert to fraction form
    8,986.50/19,431 = 19,431/x
  3. Step 3: Cross multiply
    8,986.50x = 19,431 × 19,431
  4. Step 4: Simplify right side
    8,986.50x = 377,563,761
  5. Step 5: Solve for x
    x = 377,563,761/8,986.50
  6. Step 6: Final answer
    x = 42,014.55

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.