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Finding the Fourth Proportional to 54,989.28, 82,483.89 and 19,928.88

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Solution

The fourth proportional to 54,989.28, 82,483.89 and 19,928.88 is: 29,893.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,989.28 : 82,483.89 = 19,928.88 : x
  2. Step 2: Convert to fraction form
    54,989.28/82,483.89 = 19,928.88/x
  3. Step 3: Cross multiply
    54,989.28x = 82,483.89 × 19,928.88
  4. Step 4: Simplify right side
    54,989.28x = 1,643,811,545.74
  5. Step 5: Solve for x
    x = 1,643,811,545.74/54,989.28
  6. Step 6: Final answer
    x = 29,893.31

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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.