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Finding the Fourth Proportional to 28,273.92, 42,404.40 and 12,696

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Solution

The fourth proportional to 28,273.92, 42,404.40 and 12,696 is: 19,041.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,273.92 : 42,404.40 = 12,696 : x
  2. Step 2: Convert to fraction form
    28,273.92/42,404.40 = 12,696/x
  3. Step 3: Cross multiply
    28,273.92x = 42,404.40 × 12,696
  4. Step 4: Simplify right side
    28,273.92x = 538,366,262.40
  5. Step 5: Solve for x
    x = 538,366,262.40/28,273.92
  6. Step 6: Final answer
    x = 19,041.09

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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.