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Finding the Fourth Proportional to 18,503.72, 27,756.72 and 5,355.80

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Solution

The fourth proportional to 18,503.72, 27,756.72 and 5,355.80 is: 8,034.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,503.72 : 27,756.72 = 5,355.80 : x
  2. Step 2: Convert to fraction form
    18,503.72/27,756.72 = 5,355.80/x
  3. Step 3: Cross multiply
    18,503.72x = 27,756.72 × 5,355.80
  4. Step 4: Simplify right side
    18,503.72x = 148,659,440.98
  5. Step 5: Solve for x
    x = 148,659,440.98/18,503.72
  6. Step 6: Final answer
    x = 8,034.03

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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.