Home / 3,811.40-5,259.82-2,132.79

Finding the Fourth Proportional to 3,811.40, 5,259.82 and 2,132.79

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Solution

The fourth proportional to 3,811.40, 5,259.82 and 2,132.79 is: 2,943.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,811.40 : 5,259.82 = 2,132.79 : x
  2. Step 2: Convert to fraction form
    3,811.40/5,259.82 = 2,132.79/x
  3. Step 3: Cross multiply
    3,811.40x = 5,259.82 × 2,132.79
  4. Step 4: Simplify right side
    3,811.40x = 11,218,094.16
  5. Step 5: Solve for x
    x = 11,218,094.16/3,811.40
  6. Step 6: Final answer
    x = 2,943.30

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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.