Home / 3,128.22-4,313.49-2,131.50

Finding the Fourth Proportional to 3,128.22, 4,313.49 and 2,131.50

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Solution

The fourth proportional to 3,128.22, 4,313.49 and 2,131.50 is: 2,939.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.22 : 4,313.49 = 2,131.50 : x
  2. Step 2: Convert to fraction form
    3,128.22/4,313.49 = 2,131.50/x
  3. Step 3: Cross multiply
    3,128.22x = 4,313.49 × 2,131.50
  4. Step 4: Simplify right side
    3,128.22x = 9,194,203.94
  5. Step 5: Solve for x
    x = 9,194,203.94/3,128.22
  6. Step 6: Final answer
    x = 2,939.12

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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.