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Finding the Fourth Proportional to 28,108.60, 38,788.82 and 16,173.78

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Solution

The fourth proportional to 28,108.60, 38,788.82 and 16,173.78 is: 22,319.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,108.60 : 38,788.82 = 16,173.78 : x
  2. Step 2: Convert to fraction form
    28,108.60/38,788.82 = 16,173.78/x
  3. Step 3: Cross multiply
    28,108.60x = 38,788.82 × 16,173.78
  4. Step 4: Simplify right side
    28,108.60x = 627,361,841.14
  5. Step 5: Solve for x
    x = 627,361,841.14/28,108.60
  6. Step 6: Final answer
    x = 22,319.21

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