Home / 3,830.70-5,286.09-2,129.29

Finding the Fourth Proportional to 3,830.70, 5,286.09 and 2,129.29

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Solution

The fourth proportional to 3,830.70, 5,286.09 and 2,129.29 is: 2,938.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,830.70 : 5,286.09 = 2,129.29 : x
  2. Step 2: Convert to fraction form
    3,830.70/5,286.09 = 2,129.29/x
  3. Step 3: Cross multiply
    3,830.70x = 5,286.09 × 2,129.29
  4. Step 4: Simplify right side
    3,830.70x = 11,255,618.58
  5. Step 5: Solve for x
    x = 11,255,618.58/3,830.70
  6. Step 6: Final answer
    x = 2,938.27

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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.