Home / 3,991.80-5,507.76-2,419.56

Finding the Fourth Proportional to 3,991.80, 5,507.76 and 2,419.56

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Solution

The fourth proportional to 3,991.80, 5,507.76 and 2,419.56 is: 3,338.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.80 : 5,507.76 = 2,419.56 : x
  2. Step 2: Convert to fraction form
    3,991.80/5,507.76 = 2,419.56/x
  3. Step 3: Cross multiply
    3,991.80x = 5,507.76 × 2,419.56
  4. Step 4: Simplify right side
    3,991.80x = 13,326,355.79
  5. Step 5: Solve for x
    x = 13,326,355.79/3,991.80
  6. Step 6: Final answer
    x = 3,338.43

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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.