Home / 3,899.22-5,380.90-2,130.82

Finding the Fourth Proportional to 3,899.22, 5,380.90 and 2,130.82

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Solution

The fourth proportional to 3,899.22, 5,380.90 and 2,130.82 is: 2,940.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,899.22 : 5,380.90 = 2,130.82 : x
  2. Step 2: Convert to fraction form
    3,899.22/5,380.90 = 2,130.82/x
  3. Step 3: Cross multiply
    3,899.22x = 5,380.90 × 2,130.82
  4. Step 4: Simplify right side
    3,899.22x = 11,465,729.34
  5. Step 5: Solve for x
    x = 11,465,729.34/3,899.22
  6. Step 6: Final answer
    x = 2,940.52

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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.