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Finding the Fourth Proportional to 28,908.52, 43,339.74 and 12,481

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Solution

The fourth proportional to 28,908.52, 43,339.74 and 12,481 is: 18,711.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,908.52 : 43,339.74 = 12,481 : x
  2. Step 2: Convert to fraction form
    28,908.52/43,339.74 = 12,481/x
  3. Step 3: Cross multiply
    28,908.52x = 43,339.74 × 12,481
  4. Step 4: Simplify right side
    28,908.52x = 540,923,294.94
  5. Step 5: Solve for x
    x = 540,923,294.94/28,908.52
  6. Step 6: Final answer
    x = 18,711.55

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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.