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Finding the Fourth Proportional to 55,326, 82,990.44 and 18,390

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Solution

The fourth proportional to 55,326, 82,990.44 and 18,390 is: 27,585.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,326 : 82,990.44 = 18,390 : x
  2. Step 2: Convert to fraction form
    55,326/82,990.44 = 18,390/x
  3. Step 3: Cross multiply
    55,326x = 82,990.44 × 18,390
  4. Step 4: Simplify right side
    55,326x = 1,526,194,191.60
  5. Step 5: Solve for x
    x = 1,526,194,191.60/55,326
  6. Step 6: Final answer
    x = 27,585.48

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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.