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Finding the Fourth Proportional to 8,405.87, 11,600.37 and 4,629.32

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Solution

The fourth proportional to 8,405.87, 11,600.37 and 4,629.32 is: 6,388.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,405.87 : 11,600.37 = 4,629.32 : x
  2. Step 2: Convert to fraction form
    8,405.87/11,600.37 = 4,629.32/x
  3. Step 3: Cross multiply
    8,405.87x = 11,600.37 × 4,629.32
  4. Step 4: Simplify right side
    8,405.87x = 53,701,766.85
  5. Step 5: Solve for x
    x = 53,701,766.85/8,405.87
  6. Step 6: Final answer
    x = 6,388.61

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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.