Home / 3,780.45-5,217.21-2,101.89

Finding the Fourth Proportional to 3,780.45, 5,217.21 and 2,101.89

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Solution

The fourth proportional to 3,780.45, 5,217.21 and 2,101.89 is: 2,900.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,780.45 : 5,217.21 = 2,101.89 : x
  2. Step 2: Convert to fraction form
    3,780.45/5,217.21 = 2,101.89/x
  3. Step 3: Cross multiply
    3,780.45x = 5,217.21 × 2,101.89
  4. Step 4: Simplify right side
    3,780.45x = 10,965,984.41
  5. Step 5: Solve for x
    x = 10,965,984.41/3,780.45
  6. Step 6: Final answer
    x = 2,900.71

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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.