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Finding the Fourth Proportional to 18,415.26, 27,606 and 6,720.30

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Solution

The fourth proportional to 18,415.26, 27,606 and 6,720.30 is: 10,074.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,415.26 : 27,606 = 6,720.30 : x
  2. Step 2: Convert to fraction form
    18,415.26/27,606 = 6,720.30/x
  3. Step 3: Cross multiply
    18,415.26x = 27,606 × 6,720.30
  4. Step 4: Simplify right side
    18,415.26x = 185,520,601.80
  5. Step 5: Solve for x
    x = 185,520,601.80/18,415.26
  6. Step 6: Final answer
    x = 10,074.29

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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.