Home / 2,921.55-4,029.92-2,082.51

Finding the Fourth Proportional to 2,921.55, 4,029.92 and 2,082.51

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Solution

The fourth proportional to 2,921.55, 4,029.92 and 2,082.51 is: 2,872.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,921.55 : 4,029.92 = 2,082.51 : x
  2. Step 2: Convert to fraction form
    2,921.55/4,029.92 = 2,082.51/x
  3. Step 3: Cross multiply
    2,921.55x = 4,029.92 × 2,082.51
  4. Step 4: Simplify right side
    2,921.55x = 8,392,348.70
  5. Step 5: Solve for x
    x = 8,392,348.70/2,921.55
  6. Step 6: Final answer
    x = 2,872.57

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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.