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Finding the Fourth Proportional to 28,908.32, 43,362.48 and 8,131.82

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Solution

The fourth proportional to 28,908.32, 43,362.48 and 8,131.82 is: 12,197.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,908.32 : 43,362.48 = 8,131.82 : x
  2. Step 2: Convert to fraction form
    28,908.32/43,362.48 = 8,131.82/x
  3. Step 3: Cross multiply
    28,908.32x = 43,362.48 × 8,131.82
  4. Step 4: Simplify right side
    28,908.32x = 352,615,882.11
  5. Step 5: Solve for x
    x = 352,615,882.11/28,908.32
  6. Step 6: Final answer
    x = 12,197.73

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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.