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Finding the Third Proportional to 7,731 and 11,698.50

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Solution

The third proportional to 7,731 and 11,698.50 is: 17,702.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,731 : 11,698.50 = 11,698.50 : x
  2. Step 2: Convert to fraction form
    7,731/11,698.50 = 11,698.50/x
  3. Step 3: Cross multiply
    7,731x = 11,698.50 × 11,698.50
  4. Step 4: Simplify right side
    7,731x = 136,854,902.25
  5. Step 5: Solve for x
    x = 136,854,902.25/7,731
  6. Step 6: Final answer
    x = 17,702.10

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.