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Finding the Fourth Proportional to 7,945.80, 11,910.06 and 5,174.40

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Solution

The fourth proportional to 7,945.80, 11,910.06 and 5,174.40 is: 7,755.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,945.80 : 11,910.06 = 5,174.40 : x
  2. Step 2: Convert to fraction form
    7,945.80/11,910.06 = 5,174.40/x
  3. Step 3: Cross multiply
    7,945.80x = 11,910.06 × 5,174.40
  4. Step 4: Simplify right side
    7,945.80x = 61,627,414.46
  5. Step 5: Solve for x
    x = 61,627,414.46/7,945.80
  6. Step 6: Final answer
    x = 7,755.97

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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.