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Finding the Third Proportional to 7,900 and 16,690

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Solution

The third proportional to 7,900 and 16,690 is: 35,260.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,900 : 16,690 = 16,690 : x
  2. Step 2: Convert to fraction form
    7,900/16,690 = 16,690/x
  3. Step 3: Cross multiply
    7,900x = 16,690 × 16,690
  4. Step 4: Simplify right side
    7,900x = 278,556,100
  5. Step 5: Solve for x
    x = 278,556,100/7,900
  6. Step 6: Final answer
    x = 35,260.27

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.