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Finding the Fourth Proportional to 5,874.87, 8,108.74 and 3,989.60

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Solution

The fourth proportional to 5,874.87, 8,108.74 and 3,989.60 is: 5,506.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,874.87 : 8,108.74 = 3,989.60 : x
  2. Step 2: Convert to fraction form
    5,874.87/8,108.74 = 3,989.60/x
  3. Step 3: Cross multiply
    5,874.87x = 8,108.74 × 3,989.60
  4. Step 4: Simplify right side
    5,874.87x = 32,350,629.10
  5. Step 5: Solve for x
    x = 32,350,629.10/5,874.87
  6. Step 6: Final answer
    x = 5,506.61

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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.