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Finding the Fourth Proportional to 8,179.99, 12,269.31 and 3,248.31

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Solution

The fourth proportional to 8,179.99, 12,269.31 and 3,248.31 is: 4,872.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,179.99 : 12,269.31 = 3,248.31 : x
  2. Step 2: Convert to fraction form
    8,179.99/12,269.31 = 3,248.31/x
  3. Step 3: Cross multiply
    8,179.99x = 12,269.31 × 3,248.31
  4. Step 4: Simplify right side
    8,179.99x = 39,854,487.18
  5. Step 5: Solve for x
    x = 39,854,487.18/8,179.99
  6. Step 6: Final answer
    x = 4,872.19

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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.