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Finding the Fourth Proportional to 8,269.74, 12,405.39 and 2,720.82

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Solution

The fourth proportional to 8,269.74, 12,405.39 and 2,720.82 is: 4,081.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,269.74 : 12,405.39 = 2,720.82 : x
  2. Step 2: Convert to fraction form
    8,269.74/12,405.39 = 2,720.82/x
  3. Step 3: Cross multiply
    8,269.74x = 12,405.39 × 2,720.82
  4. Step 4: Simplify right side
    8,269.74x = 33,752,833.22
  5. Step 5: Solve for x
    x = 33,752,833.22/8,269.74
  6. Step 6: Final answer
    x = 4,081.49

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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.