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Finding the Fourth Proportional to 13,310.78, 19,949.21 and 7,073.78

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Solution

The fourth proportional to 13,310.78, 19,949.21 and 7,073.78 is: 10,601.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,310.78 : 19,949.21 = 7,073.78 : x
  2. Step 2: Convert to fraction form
    13,310.78/19,949.21 = 7,073.78/x
  3. Step 3: Cross multiply
    13,310.78x = 19,949.21 × 7,073.78
  4. Step 4: Simplify right side
    13,310.78x = 141,116,305.03
  5. Step 5: Solve for x
    x = 141,116,305.03/13,310.78
  6. Step 6: Final answer
    x = 10,601.66

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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.