Home / 5,121.37-7,065.34-3,131.29

Finding the Fourth Proportional to 5,121.37, 7,065.34 and 3,131.29

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Solution

The fourth proportional to 5,121.37, 7,065.34 and 3,131.29 is: 4,319.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.37 : 7,065.34 = 3,131.29 : x
  2. Step 2: Convert to fraction form
    5,121.37/7,065.34 = 3,131.29/x
  3. Step 3: Cross multiply
    5,121.37x = 7,065.34 × 3,131.29
  4. Step 4: Simplify right side
    5,121.37x = 22,123,628.49
  5. Step 5: Solve for x
    x = 22,123,628.49/5,121.37
  6. Step 6: Final answer
    x = 4,319.87

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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.