Home / 5,151.39-7,109.21-2,912.44

Finding the Fourth Proportional to 5,151.39, 7,109.21 and 2,912.44

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Solution

The fourth proportional to 5,151.39, 7,109.21 and 2,912.44 is: 4,019.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,151.39 : 7,109.21 = 2,912.44 : x
  2. Step 2: Convert to fraction form
    5,151.39/7,109.21 = 2,912.44/x
  3. Step 3: Cross multiply
    5,151.39x = 7,109.21 × 2,912.44
  4. Step 4: Simplify right side
    5,151.39x = 20,705,147.57
  5. Step 5: Solve for x
    x = 20,705,147.57/5,151.39
  6. Step 6: Final answer
    x = 4,019.33

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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.