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Finding the Third Proportional to 8,840 and 12,980

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Solution

The third proportional to 8,840 and 12,980 is: 19,058.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,840 : 12,980 = 12,980 : x
  2. Step 2: Convert to fraction form
    8,840/12,980 = 12,980/x
  3. Step 3: Cross multiply
    8,840x = 12,980 × 12,980
  4. Step 4: Simplify right side
    8,840x = 168,480,400
  5. Step 5: Solve for x
    x = 168,480,400/8,840
  6. Step 6: Final answer
    x = 19,058.87

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.