Home / 3,781.49-5,216.29-3,139.80

Finding the Fourth Proportional to 3,781.49, 5,216.29 and 3,139.80

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Solution

The fourth proportional to 3,781.49, 5,216.29 and 3,139.80 is: 4,331.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,781.49 : 5,216.29 = 3,139.80 : x
  2. Step 2: Convert to fraction form
    3,781.49/5,216.29 = 3,139.80/x
  3. Step 3: Cross multiply
    3,781.49x = 5,216.29 × 3,139.80
  4. Step 4: Simplify right side
    3,781.49x = 16,378,120.38
  5. Step 5: Solve for x
    x = 16,378,120.38/3,781.49
  6. Step 6: Final answer
    x = 4,331.13

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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.