Home / 3,811.40-5,259.84-2,132.87

Finding the Fourth Proportional to 3,811.40, 5,259.84 and 2,132.87

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Solution

The fourth proportional to 3,811.40, 5,259.84 and 2,132.87 is: 2,943.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,811.40 : 5,259.84 = 2,132.87 : x
  2. Step 2: Convert to fraction form
    3,811.40/5,259.84 = 2,132.87/x
  3. Step 3: Cross multiply
    3,811.40x = 5,259.84 × 2,132.87
  4. Step 4: Simplify right side
    3,811.40x = 11,218,554.94
  5. Step 5: Solve for x
    x = 11,218,554.94/3,811.40
  6. Step 6: Final answer
    x = 2,943.42

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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.