Home / 3,902.80-5,385.81-2,134.30

Finding the Fourth Proportional to 3,902.80, 5,385.81 and 2,134.30

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Solution

The fourth proportional to 3,902.80, 5,385.81 and 2,134.30 is: 2,945.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,902.80 : 5,385.81 = 2,134.30 : x
  2. Step 2: Convert to fraction form
    3,902.80/5,385.81 = 2,134.30/x
  3. Step 3: Cross multiply
    3,902.80x = 5,385.81 × 2,134.30
  4. Step 4: Simplify right side
    3,902.80x = 11,494,934.28
  5. Step 5: Solve for x
    x = 11,494,934.28/3,902.80
  6. Step 6: Final answer
    x = 2,945.30

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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.