Home / 3,976.80-5,487.90-2,208.36

Finding the Fourth Proportional to 3,976.80, 5,487.90 and 2,208.36

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Solution

The fourth proportional to 3,976.80, 5,487.90 and 2,208.36 is: 3,047.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,976.80 : 5,487.90 = 2,208.36 : x
  2. Step 2: Convert to fraction form
    3,976.80/5,487.90 = 2,208.36/x
  3. Step 3: Cross multiply
    3,976.80x = 5,487.90 × 2,208.36
  4. Step 4: Simplify right side
    3,976.80x = 12,119,258.84
  5. Step 5: Solve for x
    x = 12,119,258.84/3,976.80
  6. Step 6: Final answer
    x = 3,047.49

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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.