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Finding the Third Proportional to 9,919 and 21,615

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Solution

The third proportional to 9,919 and 21,615 is: 47,102.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,919 : 21,615 = 21,615 : x
  2. Step 2: Convert to fraction form
    9,919/21,615 = 21,615/x
  3. Step 3: Cross multiply
    9,919x = 21,615 × 21,615
  4. Step 4: Simplify right side
    9,919x = 467,208,225
  5. Step 5: Solve for x
    x = 467,208,225/9,919
  6. Step 6: Final answer
    x = 47,102.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.