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Finding the Fourth Proportional to 18,699.46, 28,048.97 and 5,372.78

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Solution

The fourth proportional to 18,699.46, 28,048.97 and 5,372.78 is: 8,059.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,699.46 : 28,048.97 = 5,372.78 : x
  2. Step 2: Convert to fraction form
    18,699.46/28,048.97 = 5,372.78/x
  3. Step 3: Cross multiply
    18,699.46x = 28,048.97 × 5,372.78
  4. Step 4: Simplify right side
    18,699.46x = 150,700,777.93
  5. Step 5: Solve for x
    x = 150,700,777.93/18,699.46
  6. Step 6: Final answer
    x = 8,059.10

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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.