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Finding the Fourth Proportional to 8,431.37, 12,625.49 and 8,181.93

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Solution

The fourth proportional to 8,431.37, 12,625.49 and 8,181.93 is: 12,251.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,431.37 : 12,625.49 = 8,181.93 : x
  2. Step 2: Convert to fraction form
    8,431.37/12,625.49 = 8,181.93/x
  3. Step 3: Cross multiply
    8,431.37x = 12,625.49 × 8,181.93
  4. Step 4: Simplify right side
    8,431.37x = 103,300,834.49
  5. Step 5: Solve for x
    x = 103,300,834.49/8,431.37
  6. Step 6: Final answer
    x = 12,251.97

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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.