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Finding the Fourth Proportional to 5,891.70, 8,129.57 and 3,904.95

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Solution

The fourth proportional to 5,891.70, 8,129.57 and 3,904.95 is: 5,388.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,891.70 : 8,129.57 = 3,904.95 : x
  2. Step 2: Convert to fraction form
    5,891.70/8,129.57 = 3,904.95/x
  3. Step 3: Cross multiply
    5,891.70x = 8,129.57 × 3,904.95
  4. Step 4: Simplify right side
    5,891.70x = 31,745,544.85
  5. Step 5: Solve for x
    x = 31,745,544.85/5,891.70
  6. Step 6: Final answer
    x = 5,388.18

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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.