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Finding the Fourth Proportional to 54,453.64, 81,690.82 and 18,913.61

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Solution

The fourth proportional to 54,453.64, 81,690.82 and 18,913.61 is: 28,374.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,453.64 : 81,690.82 = 18,913.61 : x
  2. Step 2: Convert to fraction form
    54,453.64/81,690.82 = 18,913.61/x
  3. Step 3: Cross multiply
    54,453.64x = 81,690.82 × 18,913.61
  4. Step 4: Simplify right side
    54,453.64x = 1,545,067,854.32
  5. Step 5: Solve for x
    x = 1,545,067,854.32/54,453.64
  6. Step 6: Final answer
    x = 28,374.01

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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.