Home / 3,980.82-5,493.04-2,212.79

Finding the Fourth Proportional to 3,980.82, 5,493.04 and 2,212.79

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Solution

The fourth proportional to 3,980.82, 5,493.04 and 2,212.79 is: 3,053.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,980.82 : 5,493.04 = 2,212.79 : x
  2. Step 2: Convert to fraction form
    3,980.82/5,493.04 = 2,212.79/x
  3. Step 3: Cross multiply
    3,980.82x = 5,493.04 × 2,212.79
  4. Step 4: Simplify right side
    3,980.82x = 12,154,952.18
  5. Step 5: Solve for x
    x = 12,154,952.18/3,980.82
  6. Step 6: Final answer
    x = 3,053.38

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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.