Home / 3,939.88-5,911.98-3,330.76

Finding the Fourth Proportional to 3,939.88, 5,911.98 and 3,330.76

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Solution

The fourth proportional to 3,939.88, 5,911.98 and 3,330.76 is: 4,997.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.88 : 5,911.98 = 3,330.76 : x
  2. Step 2: Convert to fraction form
    3,939.88/5,911.98 = 3,330.76/x
  3. Step 3: Cross multiply
    3,939.88x = 5,911.98 × 3,330.76
  4. Step 4: Simplify right side
    3,939.88x = 19,691,386.50
  5. Step 5: Solve for x
    x = 19,691,386.50/3,939.88
  6. Step 6: Final answer
    x = 4,997.97

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1.5x scale

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.