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Finding the Fourth Proportional to 28,775.39, 43,169.00 and 12,135.47

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Solution

The fourth proportional to 28,775.39, 43,169.00 and 12,135.47 is: 18,205.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,775.39 : 43,169.00 = 12,135.47 : x
  2. Step 2: Convert to fraction form
    28,775.39/43,169.00 = 12,135.47/x
  3. Step 3: Cross multiply
    28,775.39x = 43,169.00 × 12,135.47
  4. Step 4: Simplify right side
    28,775.39x = 523,875,827.91
  5. Step 5: Solve for x
    x = 523,875,827.91/28,775.39
  6. Step 6: Final answer
    x = 18,205.69

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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.