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Finding the Fourth Proportional to 8,179.81, 12,259.42 and 4,431.44

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Solution

The fourth proportional to 8,179.81, 12,259.42 and 4,431.44 is: 6,641.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,179.81 : 12,259.42 = 4,431.44 : x
  2. Step 2: Convert to fraction form
    8,179.81/12,259.42 = 4,431.44/x
  3. Step 3: Cross multiply
    8,179.81x = 12,259.42 × 4,431.44
  4. Step 4: Simplify right side
    8,179.81x = 54,326,903.73
  5. Step 5: Solve for x
    x = 54,326,903.73/8,179.81
  6. Step 6: Final answer
    x = 6,641.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.