Home / 3,940.70-5,440.11-2,688.26

Finding the Fourth Proportional to 3,940.70, 5,440.11 and 2,688.26

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Solution

The fourth proportional to 3,940.70, 5,440.11 and 2,688.26 is: 3,711.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,940.70 : 5,440.11 = 2,688.26 : x
  2. Step 2: Convert to fraction form
    3,940.70/5,440.11 = 2,688.26/x
  3. Step 3: Cross multiply
    3,940.70x = 5,440.11 × 2,688.26
  4. Step 4: Simplify right side
    3,940.70x = 14,624,430.11
  5. Step 5: Solve for x
    x = 14,624,430.11/3,940.70
  6. Step 6: Final answer
    x = 3,711.12

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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.