Home / 3,130.30-4,321.11-2,011.30

Finding the Fourth Proportional to 3,130.30, 4,321.11 and 2,011.30

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Solution

The fourth proportional to 3,130.30, 4,321.11 and 2,011.30 is: 2,776.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,130.30 : 4,321.11 = 2,011.30 : x
  2. Step 2: Convert to fraction form
    3,130.30/4,321.11 = 2,011.30/x
  3. Step 3: Cross multiply
    3,130.30x = 4,321.11 × 2,011.30
  4. Step 4: Simplify right side
    3,130.30x = 8,691,048.54
  5. Step 5: Solve for x
    x = 8,691,048.54/3,130.30
  6. Step 6: Final answer
    x = 2,776.43

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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.