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Finding the Fourth Proportional to 13,606.86, 20,391.29 and 7,353.39

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Solution

The fourth proportional to 13,606.86, 20,391.29 and 7,353.39 is: 11,019.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,606.86 : 20,391.29 = 7,353.39 : x
  2. Step 2: Convert to fraction form
    13,606.86/20,391.29 = 7,353.39/x
  3. Step 3: Cross multiply
    13,606.86x = 20,391.29 × 7,353.39
  4. Step 4: Simplify right side
    13,606.86x = 149,945,107.97
  5. Step 5: Solve for x
    x = 149,945,107.97/13,606.86
  6. Step 6: Final answer
    x = 11,019.82

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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.