Home / 3,971.61-5,480.97-2,178.98

Finding the Fourth Proportional to 3,971.61, 5,480.97 and 2,178.98

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Solution

The fourth proportional to 3,971.61, 5,480.97 and 2,178.98 is: 3,007.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,971.61 : 5,480.97 = 2,178.98 : x
  2. Step 2: Convert to fraction form
    3,971.61/5,480.97 = 2,178.98/x
  3. Step 3: Cross multiply
    3,971.61x = 5,480.97 × 2,178.98
  4. Step 4: Simplify right side
    3,971.61x = 11,942,924.01
  5. Step 5: Solve for x
    x = 11,942,924.01/3,971.61
  6. Step 6: Final answer
    x = 3,007.07

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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.