Home / 3,140.72-4,336.92-1,963.80

Finding the Fourth Proportional to 3,140.72, 4,336.92 and 1,963.80

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Solution

The fourth proportional to 3,140.72, 4,336.92 and 1,963.80 is: 2,711.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,140.72 : 4,336.92 = 1,963.80 : x
  2. Step 2: Convert to fraction form
    3,140.72/4,336.92 = 1,963.80/x
  3. Step 3: Cross multiply
    3,140.72x = 4,336.92 × 1,963.80
  4. Step 4: Simplify right side
    3,140.72x = 8,516,843.50
  5. Step 5: Solve for x
    x = 8,516,843.50/3,140.72
  6. Step 6: Final answer
    x = 2,711.75

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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.