Home / 3,139.91-4,333.11-1,961.66

Finding the Fourth Proportional to 3,139.91, 4,333.11 and 1,961.66

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Solution

The fourth proportional to 3,139.91, 4,333.11 and 1,961.66 is: 2,707.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.91 : 4,333.11 = 1,961.66 : x
  2. Step 2: Convert to fraction form
    3,139.91/4,333.11 = 1,961.66/x
  3. Step 3: Cross multiply
    3,139.91x = 4,333.11 × 1,961.66
  4. Step 4: Simplify right side
    3,139.91x = 8,500,088.56
  5. Step 5: Solve for x
    x = 8,500,088.56/3,139.91
  6. Step 6: Final answer
    x = 2,707.11

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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.