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Finding the Fourth Proportional to 3,901.92, 5,384.76 and 2,133.56

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Solution

The fourth proportional to 3,901.92, 5,384.76 and 2,133.56 is: 2,944.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,901.92 : 5,384.76 = 2,133.56 : x
  2. Step 2: Convert to fraction form
    3,901.92/5,384.76 = 2,133.56/x
  3. Step 3: Cross multiply
    3,901.92x = 5,384.76 × 2,133.56
  4. Step 4: Simplify right side
    3,901.92x = 11,488,708.55
  5. Step 5: Solve for x
    x = 11,488,708.55/3,901.92
  6. Step 6: Final answer
    x = 2,944.37

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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.