Home / 8,121.72-12,182.58-2,278.38

Finding the Fourth Proportional to 8,121.72, 12,182.58 and 2,278.38

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Solution

The fourth proportional to 8,121.72, 12,182.58 and 2,278.38 is: 3,417.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,121.72 : 12,182.58 = 2,278.38 : x
  2. Step 2: Convert to fraction form
    8,121.72/12,182.58 = 2,278.38/x
  3. Step 3: Cross multiply
    8,121.72x = 12,182.58 × 2,278.38
  4. Step 4: Simplify right side
    8,121.72x = 27,756,546.62
  5. Step 5: Solve for x
    x = 27,756,546.62/8,121.72
  6. Step 6: Final answer
    x = 3,417.57

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Similar ratio
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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.