Home / 3,939.86-5,902.08-2,380.20

Finding the Fourth Proportional to 3,939.86, 5,902.08 and 2,380.20

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Solution

The fourth proportional to 3,939.86, 5,902.08 and 2,380.20 is: 3,565.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.86 : 5,902.08 = 2,380.20 : x
  2. Step 2: Convert to fraction form
    3,939.86/5,902.08 = 2,380.20/x
  3. Step 3: Cross multiply
    3,939.86x = 5,902.08 × 2,380.20
  4. Step 4: Simplify right side
    3,939.86x = 14,048,130.82
  5. Step 5: Solve for x
    x = 14,048,130.82/3,939.86
  6. Step 6: Final answer
    x = 3,565.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.