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Finding the Fourth Proportional to 18,846.72, 28,240.92 and 12,519

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Solution

The fourth proportional to 18,846.72, 28,240.92 and 12,519 is: 18,759.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,846.72 : 28,240.92 = 12,519 : x
  2. Step 2: Convert to fraction form
    18,846.72/28,240.92 = 12,519/x
  3. Step 3: Cross multiply
    18,846.72x = 28,240.92 × 12,519
  4. Step 4: Simplify right side
    18,846.72x = 353,548,077.48
  5. Step 5: Solve for x
    x = 353,548,077.48/18,846.72
  6. Step 6: Final answer
    x = 18,759.13

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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.