Home / 3,728.57-5,145.12-2,156.76

Finding the Fourth Proportional to 3,728.57, 5,145.12 and 2,156.76

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Solution

The fourth proportional to 3,728.57, 5,145.12 and 2,156.76 is: 2,976.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,728.57 : 5,145.12 = 2,156.76 : x
  2. Step 2: Convert to fraction form
    3,728.57/5,145.12 = 2,156.76/x
  3. Step 3: Cross multiply
    3,728.57x = 5,145.12 × 2,156.76
  4. Step 4: Simplify right side
    3,728.57x = 11,096,789.01
  5. Step 5: Solve for x
    x = 11,096,789.01/3,728.57
  6. Step 6: Final answer
    x = 2,976.16

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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.