Home / 3,723.20-5,138.65-2,152.21

Finding the Fourth Proportional to 3,723.20, 5,138.65 and 2,152.21

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Solution

The fourth proportional to 3,723.20, 5,138.65 and 2,152.21 is: 2,970.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,723.20 : 5,138.65 = 2,152.21 : x
  2. Step 2: Convert to fraction form
    3,723.20/5,138.65 = 2,152.21/x
  3. Step 3: Cross multiply
    3,723.20x = 5,138.65 × 2,152.21
  4. Step 4: Simplify right side
    3,723.20x = 11,059,453.92
  5. Step 5: Solve for x
    x = 11,059,453.92/3,723.20
  6. Step 6: Final answer
    x = 2,970.42

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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.