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Finding the Fourth Proportional to 5,910.80, 8,156.97 and 3,917.79

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Solution

The fourth proportional to 5,910.80, 8,156.97 and 3,917.79 is: 5,406.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,910.80 : 8,156.97 = 3,917.79 : x
  2. Step 2: Convert to fraction form
    5,910.80/8,156.97 = 3,917.79/x
  3. Step 3: Cross multiply
    5,910.80x = 8,156.97 × 3,917.79
  4. Step 4: Simplify right side
    5,910.80x = 31,957,295.50
  5. Step 5: Solve for x
    x = 31,957,295.50/5,910.80
  6. Step 6: Final answer
    x = 5,406.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.