Home / 3,971.76-5,961.66-1,998.78

Finding the Fourth Proportional to 3,971.76, 5,961.66 and 1,998.78

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Solution

The fourth proportional to 3,971.76, 5,961.66 and 1,998.78 is: 3,000.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,971.76 : 5,961.66 = 1,998.78 : x
  2. Step 2: Convert to fraction form
    3,971.76/5,961.66 = 1,998.78/x
  3. Step 3: Cross multiply
    3,971.76x = 5,961.66 × 1,998.78
  4. Step 4: Simplify right side
    3,971.76x = 11,916,046.77
  5. Step 5: Solve for x
    x = 11,916,046.77/3,971.76
  6. Step 6: Final answer
    x = 3,000.19

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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.