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Finding the Third Proportional to 4,790 and 7,869

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Solution

The third proportional to 4,790 and 7,869 is: 12,927.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,790 : 7,869 = 7,869 : x
  2. Step 2: Convert to fraction form
    4,790/7,869 = 7,869/x
  3. Step 3: Cross multiply
    4,790x = 7,869 × 7,869
  4. Step 4: Simplify right side
    4,790x = 61,921,161
  5. Step 5: Solve for x
    x = 61,921,161/4,790
  6. Step 6: Final answer
    x = 12,927.17

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Why These Related Problems?

These problems maintain the same ratio (1.64) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.