Home / 3,122.20-4,313.70-3,091.48

Finding the Fourth Proportional to 3,122.20, 4,313.70 and 3,091.48

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Solution

The fourth proportional to 3,122.20, 4,313.70 and 3,091.48 is: 4,271.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,122.20 : 4,313.70 = 3,091.48 : x
  2. Step 2: Convert to fraction form
    3,122.20/4,313.70 = 3,091.48/x
  3. Step 3: Cross multiply
    3,122.20x = 4,313.70 × 3,091.48
  4. Step 4: Simplify right side
    3,122.20x = 13,335,717.28
  5. Step 5: Solve for x
    x = 13,335,717.28/3,122.20
  6. Step 6: Final answer
    x = 4,271.26

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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.