Home / 3,911.78-5,400.99-2,730.80

Finding the Fourth Proportional to 3,911.78, 5,400.99 and 2,730.80

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Solution

The fourth proportional to 3,911.78, 5,400.99 and 2,730.80 is: 3,770.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,911.78 : 5,400.99 = 2,730.80 : x
  2. Step 2: Convert to fraction form
    3,911.78/5,400.99 = 2,730.80/x
  3. Step 3: Cross multiply
    3,911.78x = 5,400.99 × 2,730.80
  4. Step 4: Simplify right side
    3,911.78x = 14,749,023.49
  5. Step 5: Solve for x
    x = 14,749,023.49/3,911.78
  6. Step 6: Final answer
    x = 3,770.41

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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.