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Finding the Third Proportional to 7,689.75 and 9,826

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Solution

The third proportional to 7,689.75 and 9,826 is: 12,555.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,689.75 : 9,826 = 9,826 : x
  2. Step 2: Convert to fraction form
    7,689.75/9,826 = 9,826/x
  3. Step 3: Cross multiply
    7,689.75x = 9,826 × 9,826
  4. Step 4: Simplify right side
    7,689.75x = 96,550,276
  5. Step 5: Solve for x
    x = 96,550,276/7,689.75
  6. Step 6: Final answer
    x = 12,555.71

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Why These Related Problems?

These problems maintain the same ratio (1.28) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.