Home / 3,969.95-5,478.87-2,202.13

Finding the Fourth Proportional to 3,969.95, 5,478.87 and 2,202.13

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Solution

The fourth proportional to 3,969.95, 5,478.87 and 2,202.13 is: 3,039.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,969.95 : 5,478.87 = 2,202.13 : x
  2. Step 2: Convert to fraction form
    3,969.95/5,478.87 = 2,202.13/x
  3. Step 3: Cross multiply
    3,969.95x = 5,478.87 × 2,202.13
  4. Step 4: Simplify right side
    3,969.95x = 12,065,145.59
  5. Step 5: Solve for x
    x = 12,065,145.59/3,969.95
  6. Step 6: Final answer
    x = 3,039.12

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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.