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Finding the Third Proportional to 7,764 and 12,804

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Solution

The third proportional to 7,764 and 12,804 is: 21,115.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,764 : 12,804 = 12,804 : x
  2. Step 2: Convert to fraction form
    7,764/12,804 = 12,804/x
  3. Step 3: Cross multiply
    7,764x = 12,804 × 12,804
  4. Step 4: Simplify right side
    7,764x = 163,942,416
  5. Step 5: Solve for x
    x = 163,942,416/7,764
  6. Step 6: Final answer
    x = 21,115.72

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Why These Related Problems?

These problems maintain the same ratio (1.65) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.