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Finding the Third Proportional to 5,208.75 and 7,813.69

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Solution

The third proportional to 5,208.75 and 7,813.69 is: 11,721.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,208.75 : 7,813.69 = 7,813.69 : x
  2. Step 2: Convert to fraction form
    5,208.75/7,813.69 = 7,813.69/x
  3. Step 3: Cross multiply
    5,208.75x = 7,813.69 × 7,813.69
  4. Step 4: Simplify right side
    5,208.75x = 61,053,712.35
  5. Step 5: Solve for x
    x = 61,053,712.35/5,208.75
  6. Step 6: Final answer
    x = 11,721.38

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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.