Home / 3,127.94-4,311.55-2,119.34

Finding the Fourth Proportional to 3,127.94, 4,311.55 and 2,119.34

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Solution

The fourth proportional to 3,127.94, 4,311.55 and 2,119.34 is: 2,921.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,127.94 : 4,311.55 = 2,119.34 : x
  2. Step 2: Convert to fraction form
    3,127.94/4,311.55 = 2,119.34/x
  3. Step 3: Cross multiply
    3,127.94x = 4,311.55 × 2,119.34
  4. Step 4: Simplify right side
    3,127.94x = 9,137,608.22
  5. Step 5: Solve for x
    x = 9,137,608.22/3,127.94
  6. Step 6: Final answer
    x = 2,921.29

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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.