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Finding the Third Proportional to 6,920 and 15,980

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Solution

The third proportional to 6,920 and 15,980 is: 36,901.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,920 : 15,980 = 15,980 : x
  2. Step 2: Convert to fraction form
    6,920/15,980 = 15,980/x
  3. Step 3: Cross multiply
    6,920x = 15,980 × 15,980
  4. Step 4: Simplify right side
    6,920x = 255,360,400
  5. Step 5: Solve for x
    x = 255,360,400/6,920
  6. Step 6: Final answer
    x = 36,901.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.