Home / 3,120.24-4,302.36-2,872.56

Finding the Fourth Proportional to 3,120.24, 4,302.36 and 2,872.56

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Solution

The fourth proportional to 3,120.24, 4,302.36 and 2,872.56 is: 3,960.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.24 : 4,302.36 = 2,872.56 : x
  2. Step 2: Convert to fraction form
    3,120.24/4,302.36 = 2,872.56/x
  3. Step 3: Cross multiply
    3,120.24x = 4,302.36 × 2,872.56
  4. Step 4: Simplify right side
    3,120.24x = 12,358,787.24
  5. Step 5: Solve for x
    x = 12,358,787.24/3,120.24
  6. Step 6: Final answer
    x = 3,960.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.