Home / 8,205.49-12,286.86-5,423.68

Finding the Fourth Proportional to 8,205.49, 12,286.86 and 5,423.68

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Solution

The fourth proportional to 8,205.49, 12,286.86 and 5,423.68 is: 8,121.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,205.49 : 12,286.86 = 5,423.68 : x
  2. Step 2: Convert to fraction form
    8,205.49/12,286.86 = 5,423.68/x
  3. Step 3: Cross multiply
    8,205.49x = 12,286.86 × 5,423.68
  4. Step 4: Simplify right side
    8,205.49x = 66,639,996.84
  5. Step 5: Solve for x
    x = 66,639,996.84/8,205.49
  6. Step 6: Final answer
    x = 8,121.39

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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.