Home / 3,911.52-5,391.18-2,861.76

Finding the Fourth Proportional to 3,911.52, 5,391.18 and 2,861.76

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Solution

The fourth proportional to 3,911.52, 5,391.18 and 2,861.76 is: 3,944.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,911.52 : 5,391.18 = 2,861.76 : x
  2. Step 2: Convert to fraction form
    3,911.52/5,391.18 = 2,861.76/x
  3. Step 3: Cross multiply
    3,911.52x = 5,391.18 × 2,861.76
  4. Step 4: Simplify right side
    3,911.52x = 15,428,263.28
  5. Step 5: Solve for x
    x = 15,428,263.28/3,911.52
  6. Step 6: Final answer
    x = 3,944.31

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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.