Home / 3,830.94-5,286.86-2,152.21

Finding the Fourth Proportional to 3,830.94, 5,286.86 and 2,152.21

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Solution

The fourth proportional to 3,830.94, 5,286.86 and 2,152.21 is: 2,970.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,830.94 : 5,286.86 = 2,152.21 : x
  2. Step 2: Convert to fraction form
    3,830.94/5,286.86 = 2,152.21/x
  3. Step 3: Cross multiply
    3,830.94x = 5,286.86 × 2,152.21
  4. Step 4: Simplify right side
    3,830.94x = 11,378,432.96
  5. Step 5: Solve for x
    x = 11,378,432.96/3,830.94
  6. Step 6: Final answer
    x = 2,970.14

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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.