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Finding the Fourth Proportional to 11,761.79, 17,640.85 and 3,439.85

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Solution

The fourth proportional to 11,761.79, 17,640.85 and 3,439.85 is: 5,159.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,761.79 : 17,640.85 = 3,439.85 : x
  2. Step 2: Convert to fraction form
    11,761.79/17,640.85 = 3,439.85/x
  3. Step 3: Cross multiply
    11,761.79x = 17,640.85 × 3,439.85
  4. Step 4: Simplify right side
    11,761.79x = 60,681,772.47
  5. Step 5: Solve for x
    x = 60,681,772.47/11,761.79
  6. Step 6: Final answer
    x = 5,159.23

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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.