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Finding the Third Proportional to 9,210 and 21,489

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Solution

The third proportional to 9,210 and 21,489 is: 50,138.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,210 : 21,489 = 21,489 : x
  2. Step 2: Convert to fraction form
    9,210/21,489 = 21,489/x
  3. Step 3: Cross multiply
    9,210x = 21,489 × 21,489
  4. Step 4: Simplify right side
    9,210x = 461,777,121
  5. Step 5: Solve for x
    x = 461,777,121/9,210
  6. Step 6: Final answer
    x = 50,138.67

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Why These Related Problems?

These problems maintain the same ratio (2.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.