Home / 3,728.88-5,143.68-2,981.52

Finding the Fourth Proportional to 3,728.88, 5,143.68 and 2,981.52

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Solution

The fourth proportional to 3,728.88, 5,143.68 and 2,981.52 is: 4,112.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,728.88 : 5,143.68 = 2,981.52 : x
  2. Step 2: Convert to fraction form
    3,728.88/5,143.68 = 2,981.52/x
  3. Step 3: Cross multiply
    3,728.88x = 5,143.68 × 2,981.52
  4. Step 4: Simplify right side
    3,728.88x = 15,335,984.79
  5. Step 5: Solve for x
    x = 15,335,984.79/3,728.88
  6. Step 6: Final answer
    x = 4,112.76

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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.