Home / 3,813.97-5,720.90-2,780.53

Finding the Fourth Proportional to 3,813.97, 5,720.90 and 2,780.53

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Solution

The fourth proportional to 3,813.97, 5,720.90 and 2,780.53 is: 4,170.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,813.97 : 5,720.90 = 2,780.53 : x
  2. Step 2: Convert to fraction form
    3,813.97/5,720.90 = 2,780.53/x
  3. Step 3: Cross multiply
    3,813.97x = 5,720.90 × 2,780.53
  4. Step 4: Simplify right side
    3,813.97x = 15,907,120.17
  5. Step 5: Solve for x
    x = 15,907,120.17/3,813.97
  6. Step 6: Final answer
    x = 4,170.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.