Home / 3,712.42-5,122.20-2,140.21

Finding the Fourth Proportional to 3,712.42, 5,122.20 and 2,140.21

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Solution

The fourth proportional to 3,712.42, 5,122.20 and 2,140.21 is: 2,952.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,712.42 : 5,122.20 = 2,140.21 : x
  2. Step 2: Convert to fraction form
    3,712.42/5,122.20 = 2,140.21/x
  3. Step 3: Cross multiply
    3,712.42x = 5,122.20 × 2,140.21
  4. Step 4: Simplify right side
    3,712.42x = 10,962,583.66
  5. Step 5: Solve for x
    x = 10,962,583.66/3,712.42
  6. Step 6: Final answer
    x = 2,952.95

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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.