Home / 3,139.08-4,331.52-1,960.80

Finding the Fourth Proportional to 3,139.08, 4,331.52 and 1,960.80

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Solution

The fourth proportional to 3,139.08, 4,331.52 and 1,960.80 is: 2,705.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.08 : 4,331.52 = 1,960.80 : x
  2. Step 2: Convert to fraction form
    3,139.08/4,331.52 = 1,960.80/x
  3. Step 3: Cross multiply
    3,139.08x = 4,331.52 × 1,960.80
  4. Step 4: Simplify right side
    3,139.08x = 8,493,244.42
  5. Step 5: Solve for x
    x = 8,493,244.42/3,139.08
  6. Step 6: Final answer
    x = 2,705.65

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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.