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Finding the Fourth Proportional to 5,855.87, 8,078.24 and 3,989.63

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Solution

The fourth proportional to 5,855.87, 8,078.24 and 3,989.63 is: 5,503.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,855.87 : 8,078.24 = 3,989.63 : x
  2. Step 2: Convert to fraction form
    5,855.87/8,078.24 = 3,989.63/x
  3. Step 3: Cross multiply
    5,855.87x = 8,078.24 × 3,989.63
  4. Step 4: Simplify right side
    5,855.87x = 32,229,128.31
  5. Step 5: Solve for x
    x = 32,229,128.31/5,855.87
  6. Step 6: Final answer
    x = 5,503.73

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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.