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Finding the Third Proportional to 19,917 and 27,913.50

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Solution

The third proportional to 19,917 and 27,913.50 is: 39,120.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,917 : 27,913.50 = 27,913.50 : x
  2. Step 2: Convert to fraction form
    19,917/27,913.50 = 27,913.50/x
  3. Step 3: Cross multiply
    19,917x = 27,913.50 × 27,913.50
  4. Step 4: Simplify right side
    19,917x = 779,163,482.25
  5. Step 5: Solve for x
    x = 779,163,482.25/19,917
  6. Step 6: Final answer
    x = 39,120.52

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.