Home / 3,127.92-4,320.07-2,131.48

Finding the Fourth Proportional to 3,127.92, 4,320.07 and 2,131.48

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Solution

The fourth proportional to 3,127.92, 4,320.07 and 2,131.48 is: 2,943.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,127.92 : 4,320.07 = 2,131.48 : x
  2. Step 2: Convert to fraction form
    3,127.92/4,320.07 = 2,131.48/x
  3. Step 3: Cross multiply
    3,127.92x = 4,320.07 × 2,131.48
  4. Step 4: Simplify right side
    3,127.92x = 9,208,142.87
  5. Step 5: Solve for x
    x = 9,208,142.87/3,127.92
  6. Step 6: Final answer
    x = 2,943.86

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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.