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Finding the Third Proportional to 4,391 and 9,100

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Solution

The third proportional to 4,391 and 9,100 is: 18,859.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,391 : 9,100 = 9,100 : x
  2. Step 2: Convert to fraction form
    4,391/9,100 = 9,100/x
  3. Step 3: Cross multiply
    4,391x = 9,100 × 9,100
  4. Step 4: Simplify right side
    4,391x = 82,810,000
  5. Step 5: Solve for x
    x = 82,810,000/4,391
  6. Step 6: Final answer
    x = 18,859.03

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Why These Related Problems?

These problems maintain the same ratio (2.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.