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Finding the Fourth Proportional to 17,961.70, 26,906.10 and 10,161.40

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Solution

The fourth proportional to 17,961.70, 26,906.10 and 10,161.40 is: 15,221.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,961.70 : 26,906.10 = 10,161.40 : x
  2. Step 2: Convert to fraction form
    17,961.70/26,906.10 = 10,161.40/x
  3. Step 3: Cross multiply
    17,961.70x = 26,906.10 × 10,161.40
  4. Step 4: Simplify right side
    17,961.70x = 273,403,644.54
  5. Step 5: Solve for x
    x = 273,403,644.54/17,961.70
  6. Step 6: Final answer
    x = 15,221.48

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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.