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Finding the Third Proportional to 11,900 and 15,434

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Solution

The third proportional to 11,900 and 15,434 is: 20,017.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,900 : 15,434 = 15,434 : x
  2. Step 2: Convert to fraction form
    11,900/15,434 = 15,434/x
  3. Step 3: Cross multiply
    11,900x = 15,434 × 15,434
  4. Step 4: Simplify right side
    11,900x = 238,208,356
  5. Step 5: Solve for x
    x = 238,208,356/11,900
  6. Step 6: Final answer
    x = 20,017.51

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Why These Related Problems?

These problems maintain the same ratio (1.30) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.