Home / 3,913.81-5,401.03-2,145.49

Finding the Fourth Proportional to 3,913.81, 5,401.03 and 2,145.49

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Solution

The fourth proportional to 3,913.81, 5,401.03 and 2,145.49 is: 2,960.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,913.81 : 5,401.03 = 2,145.49 : x
  2. Step 2: Convert to fraction form
    3,913.81/5,401.03 = 2,145.49/x
  3. Step 3: Cross multiply
    3,913.81x = 5,401.03 × 2,145.49
  4. Step 4: Simplify right side
    3,913.81x = 11,587,855.85
  5. Step 5: Solve for x
    x = 11,587,855.85/3,913.81
  6. Step 6: Final answer
    x = 2,960.76

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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.