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Finding the Third Proportional to 11,156 and 15,518

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Solution

The third proportional to 11,156 and 15,518 is: 21,585.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,156 : 15,518 = 15,518 : x
  2. Step 2: Convert to fraction form
    11,156/15,518 = 15,518/x
  3. Step 3: Cross multiply
    11,156x = 15,518 × 15,518
  4. Step 4: Simplify right side
    11,156x = 240,808,324
  5. Step 5: Solve for x
    x = 240,808,324/11,156
  6. Step 6: Final answer
    x = 21,585.54

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.