Home / 3,980.95-5,493.66-2,212.55

Finding the Fourth Proportional to 3,980.95, 5,493.66 and 2,212.55

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Solution

The fourth proportional to 3,980.95, 5,493.66 and 2,212.55 is: 3,053.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,980.95 : 5,493.66 = 2,212.55 : x
  2. Step 2: Convert to fraction form
    3,980.95/5,493.66 = 2,212.55/x
  3. Step 3: Cross multiply
    3,980.95x = 5,493.66 × 2,212.55
  4. Step 4: Simplify right side
    3,980.95x = 12,154,982.27
  5. Step 5: Solve for x
    x = 12,154,982.27/3,980.95
  6. Step 6: Final answer
    x = 3,053.29

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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.