Home / 3,913.90-5,401.17-2,145.50

Finding the Fourth Proportional to 3,913.90, 5,401.17 and 2,145.50

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Solution

The fourth proportional to 3,913.90, 5,401.17 and 2,145.50 is: 2,960.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,913.90 : 5,401.17 = 2,145.50 : x
  2. Step 2: Convert to fraction form
    3,913.90/5,401.17 = 2,145.50/x
  3. Step 3: Cross multiply
    3,913.90x = 5,401.17 × 2,145.50
  4. Step 4: Simplify right side
    3,913.90x = 11,588,210.24
  5. Step 5: Solve for x
    x = 11,588,210.24/3,913.90
  6. Step 6: Final answer
    x = 2,960.78

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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.