Home / 3,619.42-4,991.76-2,872.20

Finding the Fourth Proportional to 3,619.42, 4,991.76 and 2,872.20

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Solution

The fourth proportional to 3,619.42, 4,991.76 and 2,872.20 is: 3,961.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,619.42 : 4,991.76 = 2,872.20 : x
  2. Step 2: Convert to fraction form
    3,619.42/4,991.76 = 2,872.20/x
  3. Step 3: Cross multiply
    3,619.42x = 4,991.76 × 2,872.20
  4. Step 4: Simplify right side
    3,619.42x = 14,337,333.07
  5. Step 5: Solve for x
    x = 14,337,333.07/3,619.42
  6. Step 6: Final answer
    x = 3,961.22

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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.