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Finding the Third Proportional to 8,840 and 13,980

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Solution

The third proportional to 8,840 and 13,980 is: 22,108.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,840 : 13,980 = 13,980 : x
  2. Step 2: Convert to fraction form
    8,840/13,980 = 13,980/x
  3. Step 3: Cross multiply
    8,840x = 13,980 × 13,980
  4. Step 4: Simplify right side
    8,840x = 195,440,400
  5. Step 5: Solve for x
    x = 195,440,400/8,840
  6. Step 6: Final answer
    x = 22,108.64

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Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.