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Finding the Fourth Proportional to 6,443.48, 8,889 and 3,789.20

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Solution

The fourth proportional to 6,443.48, 8,889 and 3,789.20 is: 5,227.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,443.48 : 8,889 = 3,789.20 : x
  2. Step 2: Convert to fraction form
    6,443.48/8,889 = 3,789.20/x
  3. Step 3: Cross multiply
    6,443.48x = 8,889 × 3,789.20
  4. Step 4: Simplify right side
    6,443.48x = 33,682,198.80
  5. Step 5: Solve for x
    x = 33,682,198.80/6,443.48
  6. Step 6: Final answer
    x = 5,227.33

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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.