Home / 3,914-5,401.20-2,145.56

Finding the Fourth Proportional to 3,914, 5,401.20 and 2,145.56

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Solution

The fourth proportional to 3,914, 5,401.20 and 2,145.56 is: 2,960.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,914 : 5,401.20 = 2,145.56 : x
  2. Step 2: Convert to fraction form
    3,914/5,401.20 = 2,145.56/x
  3. Step 3: Cross multiply
    3,914x = 5,401.20 × 2,145.56
  4. Step 4: Simplify right side
    3,914x = 11,588,598.67
  5. Step 5: Solve for x
    x = 11,588,598.67/3,914
  6. Step 6: Final answer
    x = 2,960.81

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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.