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Finding the Fourth Proportional to 13,661.66, 20,493.20 and 4,301.91

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Solution

The fourth proportional to 13,661.66, 20,493.20 and 4,301.91 is: 6,453.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,661.66 : 20,493.20 = 4,301.91 : x
  2. Step 2: Convert to fraction form
    13,661.66/20,493.20 = 4,301.91/x
  3. Step 3: Cross multiply
    13,661.66x = 20,493.20 × 4,301.91
  4. Step 4: Simplify right side
    13,661.66x = 88,159,912.77
  5. Step 5: Solve for x
    x = 88,159,912.77/13,661.66
  6. Step 6: Final answer
    x = 6,453.09

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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.