Home / 3,712.20-5,121.24-2,139.36

Finding the Fourth Proportional to 3,712.20, 5,121.24 and 2,139.36

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Solution

The fourth proportional to 3,712.20, 5,121.24 and 2,139.36 is: 2,951.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,712.20 : 5,121.24 = 2,139.36 : x
  2. Step 2: Convert to fraction form
    3,712.20/5,121.24 = 2,139.36/x
  3. Step 3: Cross multiply
    3,712.20x = 5,121.24 × 2,139.36
  4. Step 4: Simplify right side
    3,712.20x = 10,956,176.01
  5. Step 5: Solve for x
    x = 10,956,176.01/3,712.20
  6. Step 6: Final answer
    x = 2,951.40

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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.