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Finding the Fourth Proportional to 27,107.35, 40,640.94 and 12,868.78

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Solution

The fourth proportional to 27,107.35, 40,640.94 and 12,868.78 is: 19,293.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,107.35 : 40,640.94 = 12,868.78 : x
  2. Step 2: Convert to fraction form
    27,107.35/40,640.94 = 12,868.78/x
  3. Step 3: Cross multiply
    27,107.35x = 40,640.94 × 12,868.78
  4. Step 4: Simplify right side
    27,107.35x = 522,999,315.85
  5. Step 5: Solve for x
    x = 522,999,315.85/27,107.35
  6. Step 6: Final answer
    x = 19,293.63

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1.5x scale

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.