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Finding the Fourth Proportional to 6,438.87, 8,883.09 and 3,785.31

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Solution

The fourth proportional to 6,438.87, 8,883.09 and 3,785.31 is: 5,222.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,438.87 : 8,883.09 = 3,785.31 : x
  2. Step 2: Convert to fraction form
    6,438.87/8,883.09 = 3,785.31/x
  3. Step 3: Cross multiply
    6,438.87x = 8,883.09 × 3,785.31
  4. Step 4: Simplify right side
    6,438.87x = 33,625,249.41
  5. Step 5: Solve for x
    x = 33,625,249.41/6,438.87
  6. Step 6: Final answer
    x = 5,222.23

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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.