Home / 4,189.62-5,781.36-2,420.88

Finding the Fourth Proportional to 4,189.62, 5,781.36 and 2,420.88

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Solution

The fourth proportional to 4,189.62, 5,781.36 and 2,420.88 is: 3,340.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,189.62 : 5,781.36 = 2,420.88 : x
  2. Step 2: Convert to fraction form
    4,189.62/5,781.36 = 2,420.88/x
  3. Step 3: Cross multiply
    4,189.62x = 5,781.36 × 2,420.88
  4. Step 4: Simplify right side
    4,189.62x = 13,995,978.80
  5. Step 5: Solve for x
    x = 13,995,978.80/4,189.62
  6. Step 6: Final answer
    x = 3,340.63

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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.