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Finding the Fourth Proportional to 18,783.29, 28,175.54 and 8,917.49

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Solution

The fourth proportional to 18,783.29, 28,175.54 and 8,917.49 is: 13,376.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,783.29 : 28,175.54 = 8,917.49 : x
  2. Step 2: Convert to fraction form
    18,783.29/28,175.54 = 8,917.49/x
  3. Step 3: Cross multiply
    18,783.29x = 28,175.54 × 8,917.49
  4. Step 4: Simplify right side
    18,783.29x = 251,254,910.73
  5. Step 5: Solve for x
    x = 251,254,910.73/18,783.29
  6. Step 6: Final answer
    x = 13,376.52

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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.