Home / 3,977.85-5,489.51-2,185.41

Finding the Fourth Proportional to 3,977.85, 5,489.51 and 2,185.41

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Solution

The fourth proportional to 3,977.85, 5,489.51 and 2,185.41 is: 3,015.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,977.85 : 5,489.51 = 2,185.41 : x
  2. Step 2: Convert to fraction form
    3,977.85/5,489.51 = 2,185.41/x
  3. Step 3: Cross multiply
    3,977.85x = 5,489.51 × 2,185.41
  4. Step 4: Simplify right side
    3,977.85x = 11,996,830.05
  5. Step 5: Solve for x
    x = 11,996,830.05/3,977.85
  6. Step 6: Final answer
    x = 3,015.91

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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.