Home / 3,900.05-5,381.59-2,221.46

Finding the Fourth Proportional to 3,900.05, 5,381.59 and 2,221.46

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Solution

The fourth proportional to 3,900.05, 5,381.59 and 2,221.46 is: 3,065.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,900.05 : 5,381.59 = 2,221.46 : x
  2. Step 2: Convert to fraction form
    3,900.05/5,381.59 = 2,221.46/x
  3. Step 3: Cross multiply
    3,900.05x = 5,381.59 × 2,221.46
  4. Step 4: Simplify right side
    3,900.05x = 11,954,986.92
  5. Step 5: Solve for x
    x = 11,954,986.92/3,900.05
  6. Step 6: Final answer
    x = 3,065.34

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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.