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Finding the Fourth Proportional to 18,798.86, 28,159.97 and 8,908.14

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Solution

The fourth proportional to 18,798.86, 28,159.97 and 8,908.14 is: 13,344.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,798.86 : 28,159.97 = 8,908.14 : x
  2. Step 2: Convert to fraction form
    18,798.86/28,159.97 = 8,908.14/x
  3. Step 3: Cross multiply
    18,798.86x = 28,159.97 × 8,908.14
  4. Step 4: Simplify right side
    18,798.86x = 250,852,910.62
  5. Step 5: Solve for x
    x = 250,852,910.62/18,798.86
  6. Step 6: Final answer
    x = 13,344.05

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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.