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Finding the Third Proportional to 2,176 and 4,690

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Solution

The third proportional to 2,176 and 4,690 is: 10,108.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,176 : 4,690 = 4,690 : x
  2. Step 2: Convert to fraction form
    2,176/4,690 = 4,690/x
  3. Step 3: Cross multiply
    2,176x = 4,690 × 4,690
  4. Step 4: Simplify right side
    2,176x = 21,996,100
  5. Step 5: Solve for x
    x = 21,996,100/2,176
  6. Step 6: Final answer
    x = 10,108.50

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.