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Finding the Third Proportional to 3,130 and 6,980

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Solution

The third proportional to 3,130 and 6,980 is: 15,565.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,130 : 6,980 = 6,980 : x
  2. Step 2: Convert to fraction form
    3,130/6,980 = 6,980/x
  3. Step 3: Cross multiply
    3,130x = 6,980 × 6,980
  4. Step 4: Simplify right side
    3,130x = 48,720,400
  5. Step 5: Solve for x
    x = 48,720,400/3,130
  6. Step 6: Final answer
    x = 15,565.62

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Why These Related Problems?

These problems maintain the same ratio (2.23) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.