Home / 3,139.31-4,331.80-2,021.77

Finding the Fourth Proportional to 3,139.31, 4,331.80 and 2,021.77

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Solution

The fourth proportional to 3,139.31, 4,331.80 and 2,021.77 is: 2,789.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.31 : 4,331.80 = 2,021.77 : x
  2. Step 2: Convert to fraction form
    3,139.31/4,331.80 = 2,021.77/x
  3. Step 3: Cross multiply
    3,139.31x = 4,331.80 × 2,021.77
  4. Step 4: Simplify right side
    3,139.31x = 8,757,887.40
  5. Step 5: Solve for x
    x = 8,757,887.40/3,139.31
  6. Step 6: Final answer
    x = 2,789.75

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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.