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Finding the Fourth Proportional to 19,906.88, 29,857.84 and 8,218.56

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Solution

The fourth proportional to 19,906.88, 29,857.84 and 8,218.56 is: 12,326.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,906.88 : 29,857.84 = 8,218.56 : x
  2. Step 2: Convert to fraction form
    19,906.88/29,857.84 = 8,218.56/x
  3. Step 3: Cross multiply
    19,906.88x = 29,857.84 × 8,218.56
  4. Step 4: Simplify right side
    19,906.88x = 245,388,449.51
  5. Step 5: Solve for x
    x = 245,388,449.51/19,906.88
  6. Step 6: Final answer
    x = 12,326.82

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1.5x scale

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.