Home / 8,121.57-12,181.28-2,278.64

Finding the Fourth Proportional to 8,121.57, 12,181.28 and 2,278.64

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Solution

The fourth proportional to 8,121.57, 12,181.28 and 2,278.64 is: 3,417.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,121.57 : 12,181.28 = 2,278.64 : x
  2. Step 2: Convert to fraction form
    8,121.57/12,181.28 = 2,278.64/x
  3. Step 3: Cross multiply
    8,121.57x = 12,181.28 × 2,278.64
  4. Step 4: Simplify right side
    8,121.57x = 27,756,679.56
  5. Step 5: Solve for x
    x = 27,756,679.56/8,121.57
  6. Step 6: Final answer
    x = 3,417.65

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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.