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Finding the Fourth Proportional to 11,872.78, 17,809.17 and 3,108.45

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Solution

The fourth proportional to 11,872.78, 17,809.17 and 3,108.45 is: 4,662.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,872.78 : 17,809.17 = 3,108.45 : x
  2. Step 2: Convert to fraction form
    11,872.78/17,809.17 = 3,108.45/x
  3. Step 3: Cross multiply
    11,872.78x = 17,809.17 × 3,108.45
  4. Step 4: Simplify right side
    11,872.78x = 55,358,914.49
  5. Step 5: Solve for x
    x = 55,358,914.49/11,872.78
  6. Step 6: Final answer
    x = 4,662.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.