Home / 8,121.14-12,180.64-2,855.74

Finding the Fourth Proportional to 8,121.14, 12,180.64 and 2,855.74

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Solution

The fourth proportional to 8,121.14, 12,180.64 and 2,855.74 is: 4,283.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,121.14 : 12,180.64 = 2,855.74 : x
  2. Step 2: Convert to fraction form
    8,121.14/12,180.64 = 2,855.74/x
  3. Step 3: Cross multiply
    8,121.14x = 12,180.64 × 2,855.74
  4. Step 4: Simplify right side
    8,121.14x = 34,784,740.87
  5. Step 5: Solve for x
    x = 34,784,740.87/8,121.14
  6. Step 6: Final answer
    x = 4,283.23

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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.