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Finding the Fourth Proportional to 28,978.62, 39,996.75 and 17,651.85

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Solution

The fourth proportional to 28,978.62, 39,996.75 and 17,651.85 is: 24,363.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,978.62 : 39,996.75 = 17,651.85 : x
  2. Step 2: Convert to fraction form
    28,978.62/39,996.75 = 17,651.85/x
  3. Step 3: Cross multiply
    28,978.62x = 39,996.75 × 17,651.85
  4. Step 4: Simplify right side
    28,978.62x = 706,016,631.49
  5. Step 5: Solve for x
    x = 706,016,631.49/28,978.62
  6. Step 6: Final answer
    x = 24,363.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.