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Finding the Fourth Proportional to 28,913.91, 43,370.88 and 8,137.41

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Solution

The fourth proportional to 28,913.91, 43,370.88 and 8,137.41 is: 12,206.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,913.91 : 43,370.88 = 8,137.41 : x
  2. Step 2: Convert to fraction form
    28,913.91/43,370.88 = 8,137.41/x
  3. Step 3: Cross multiply
    28,913.91x = 43,370.88 × 8,137.41
  4. Step 4: Simplify right side
    28,913.91x = 352,926,632.62
  5. Step 5: Solve for x
    x = 352,926,632.62/28,913.91
  6. Step 6: Final answer
    x = 12,206.12

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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.