Home / 3,711.24-5,121.64-2,139.30

Finding the Fourth Proportional to 3,711.24, 5,121.64 and 2,139.30

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Solution

The fourth proportional to 3,711.24, 5,121.64 and 2,139.30 is: 2,952.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,711.24 : 5,121.64 = 2,139.30 : x
  2. Step 2: Convert to fraction form
    3,711.24/5,121.64 = 2,139.30/x
  3. Step 3: Cross multiply
    3,711.24x = 5,121.64 × 2,139.30
  4. Step 4: Simplify right side
    3,711.24x = 10,956,724.45
  5. Step 5: Solve for x
    x = 10,956,724.45/3,711.24
  6. Step 6: Final answer
    x = 2,952.31

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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.