Home / 3,780.90-5,217.80-2,102.30

Finding the Fourth Proportional to 3,780.90, 5,217.80 and 2,102.30

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Solution

The fourth proportional to 3,780.90, 5,217.80 and 2,102.30 is: 2,901.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,780.90 : 5,217.80 = 2,102.30 : x
  2. Step 2: Convert to fraction form
    3,780.90/5,217.80 = 2,102.30/x
  3. Step 3: Cross multiply
    3,780.90x = 5,217.80 × 2,102.30
  4. Step 4: Simplify right side
    3,780.90x = 10,969,380.94
  5. Step 5: Solve for x
    x = 10,969,380.94/3,780.90
  6. Step 6: Final answer
    x = 2,901.26

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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.