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Finding the Third Proportional to 4,121 and 8,890

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Solution

The third proportional to 4,121 and 8,890 is: 19,177.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,121 : 8,890 = 8,890 : x
  2. Step 2: Convert to fraction form
    4,121/8,890 = 8,890/x
  3. Step 3: Cross multiply
    4,121x = 8,890 × 8,890
  4. Step 4: Simplify right side
    4,121x = 79,032,100
  5. Step 5: Solve for x
    x = 79,032,100/4,121
  6. Step 6: Final answer
    x = 19,177.89

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.