Home / 5,120.62-7,064.92-3,129.13

Finding the Fourth Proportional to 5,120.62, 7,064.92 and 3,129.13

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Solution

The fourth proportional to 5,120.62, 7,064.92 and 3,129.13 is: 4,317.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,120.62 : 7,064.92 = 3,129.13 : x
  2. Step 2: Convert to fraction form
    5,120.62/7,064.92 = 3,129.13/x
  3. Step 3: Cross multiply
    5,120.62x = 7,064.92 × 3,129.13
  4. Step 4: Simplify right side
    5,120.62x = 22,107,065.86
  5. Step 5: Solve for x
    x = 22,107,065.86/5,120.62
  6. Step 6: Final answer
    x = 4,317.27

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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.