Home / 3,914.09-5,401.40-2,145.69

Finding the Fourth Proportional to 3,914.09, 5,401.40 and 2,145.69

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Solution

The fourth proportional to 3,914.09, 5,401.40 and 2,145.69 is: 2,961.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,914.09 : 5,401.40 = 2,145.69 : x
  2. Step 2: Convert to fraction form
    3,914.09/5,401.40 = 2,145.69/x
  3. Step 3: Cross multiply
    3,914.09x = 5,401.40 × 2,145.69
  4. Step 4: Simplify right side
    3,914.09x = 11,589,739.49
  5. Step 5: Solve for x
    x = 11,589,739.49/3,914.09
  6. Step 6: Final answer
    x = 2,961.03

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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.