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Finding the Fourth Proportional to 26,640, 39,960 and 10,003.86

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Solution

The fourth proportional to 26,640, 39,960 and 10,003.86 is: 15,005.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,640 : 39,960 = 10,003.86 : x
  2. Step 2: Convert to fraction form
    26,640/39,960 = 10,003.86/x
  3. Step 3: Cross multiply
    26,640x = 39,960 × 10,003.86
  4. Step 4: Simplify right side
    26,640x = 399,754,245.60
  5. Step 5: Solve for x
    x = 399,754,245.60/26,640
  6. Step 6: Final answer
    x = 15,005.79

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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.