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Finding the Third Proportional to 8,590 and 18,821

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Solution

The third proportional to 8,590 and 18,821 is: 41,237.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,590 : 18,821 = 18,821 : x
  2. Step 2: Convert to fraction form
    8,590/18,821 = 18,821/x
  3. Step 3: Cross multiply
    8,590x = 18,821 × 18,821
  4. Step 4: Simplify right side
    8,590x = 354,230,041
  5. Step 5: Solve for x
    x = 354,230,041/8,590
  6. Step 6: Final answer
    x = 41,237.49

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.