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Finding the Third Proportional to 5,220 and 9,956

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Solution

The third proportional to 5,220 and 9,956 is: 18,988.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,220 : 9,956 = 9,956 : x
  2. Step 2: Convert to fraction form
    5,220/9,956 = 9,956/x
  3. Step 3: Cross multiply
    5,220x = 9,956 × 9,956
  4. Step 4: Simplify right side
    5,220x = 99,121,936
  5. Step 5: Solve for x
    x = 99,121,936/5,220
  6. Step 6: Final answer
    x = 18,988.88

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Why These Related Problems?

These problems maintain the same ratio (1.91) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.