Home / 3,819.80-5,265.78-3,155.48

Finding the Fourth Proportional to 3,819.80, 5,265.78 and 3,155.48

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Solution

The fourth proportional to 3,819.80, 5,265.78 and 3,155.48 is: 4,349.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,819.80 : 5,265.78 = 3,155.48 : x
  2. Step 2: Convert to fraction form
    3,819.80/5,265.78 = 3,155.48/x
  3. Step 3: Cross multiply
    3,819.80x = 5,265.78 × 3,155.48
  4. Step 4: Simplify right side
    3,819.80x = 16,616,063.47
  5. Step 5: Solve for x
    x = 16,616,063.47/3,819.80
  6. Step 6: Final answer
    x = 4,349.98

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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.