Home / 3,779.20-5,213.80-2,185.56

Finding the Fourth Proportional to 3,779.20, 5,213.80 and 2,185.56

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Solution

The fourth proportional to 3,779.20, 5,213.80 and 2,185.56 is: 3,015.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,779.20 : 5,213.80 = 2,185.56 : x
  2. Step 2: Convert to fraction form
    3,779.20/5,213.80 = 2,185.56/x
  3. Step 3: Cross multiply
    3,779.20x = 5,213.80 × 2,185.56
  4. Step 4: Simplify right side
    3,779.20x = 11,395,046.66
  5. Step 5: Solve for x
    x = 11,395,046.66/3,779.20
  6. Step 6: Final answer
    x = 3,015.20

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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.