Home / 3,781.85-5,219.26-2,103.80

Finding the Fourth Proportional to 3,781.85, 5,219.26 and 2,103.80

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Solution

The fourth proportional to 3,781.85, 5,219.26 and 2,103.80 is: 2,903.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,781.85 : 5,219.26 = 2,103.80 : x
  2. Step 2: Convert to fraction form
    3,781.85/5,219.26 = 2,103.80/x
  3. Step 3: Cross multiply
    3,781.85x = 5,219.26 × 2,103.80
  4. Step 4: Simplify right side
    3,781.85x = 10,980,279.19
  5. Step 5: Solve for x
    x = 10,980,279.19/3,781.85
  6. Step 6: Final answer
    x = 2,903.41

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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.