Home / 3,980.85-5,493.75-2,212.62

Finding the Fourth Proportional to 3,980.85, 5,493.75 and 2,212.62

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Solution

The fourth proportional to 3,980.85, 5,493.75 and 2,212.62 is: 3,053.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,980.85 : 5,493.75 = 2,212.62 : x
  2. Step 2: Convert to fraction form
    3,980.85/5,493.75 = 2,212.62/x
  3. Step 3: Cross multiply
    3,980.85x = 5,493.75 × 2,212.62
  4. Step 4: Simplify right side
    3,980.85x = 12,155,581.13
  5. Step 5: Solve for x
    x = 12,155,581.13/3,980.85
  6. Step 6: Final answer
    x = 3,053.51

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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.