Home / 12,640.43-18,960.66-3,406.43

Finding the Fourth Proportional to 12,640.43, 18,960.66 and 3,406.43

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Solution

The fourth proportional to 12,640.43, 18,960.66 and 3,406.43 is: 5,109.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,640.43 : 18,960.66 = 3,406.43 : x
  2. Step 2: Convert to fraction form
    12,640.43/18,960.66 = 3,406.43/x
  3. Step 3: Cross multiply
    12,640.43x = 18,960.66 × 3,406.43
  4. Step 4: Simplify right side
    12,640.43x = 64,588,144.01
  5. Step 5: Solve for x
    x = 64,588,144.01/12,640.43
  6. Step 6: Final answer
    x = 5,109.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.