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Finding the Third Proportional to 14,797.50 and 31,431

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Solution

The third proportional to 14,797.50 and 31,431 is: 66,761.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,797.50 : 31,431 = 31,431 : x
  2. Step 2: Convert to fraction form
    14,797.50/31,431 = 31,431/x
  3. Step 3: Cross multiply
    14,797.50x = 31,431 × 31,431
  4. Step 4: Simplify right side
    14,797.50x = 987,907,761
  5. Step 5: Solve for x
    x = 987,907,761/14,797.50
  6. Step 6: Final answer
    x = 66,761.80

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.