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Finding the Third Proportional to 4,690 and 7,813

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Solution

The third proportional to 4,690 and 7,813 is: 13,015.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,690 : 7,813 = 7,813 : x
  2. Step 2: Convert to fraction form
    4,690/7,813 = 7,813/x
  3. Step 3: Cross multiply
    4,690x = 7,813 × 7,813
  4. Step 4: Simplify right side
    4,690x = 61,042,969
  5. Step 5: Solve for x
    x = 61,042,969/4,690
  6. Step 6: Final answer
    x = 13,015.56

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Why These Related Problems?

These problems maintain the same ratio (1.67) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.