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Finding the Third Proportional to 5,251.50 and 7,875

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Solution

The third proportional to 5,251.50 and 7,875 is: 11,809.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,251.50 : 7,875 = 7,875 : x
  2. Step 2: Convert to fraction form
    5,251.50/7,875 = 7,875/x
  3. Step 3: Cross multiply
    5,251.50x = 7,875 × 7,875
  4. Step 4: Simplify right side
    5,251.50x = 62,015,625
  5. Step 5: Solve for x
    x = 62,015,625/5,251.50
  6. Step 6: Final answer
    x = 11,809.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.