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Finding the Fourth Proportional to 18,562.73, 27,843.63 and 5,415.21

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Solution

The fourth proportional to 18,562.73, 27,843.63 and 5,415.21 is: 8,122.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,562.73 : 27,843.63 = 5,415.21 : x
  2. Step 2: Convert to fraction form
    18,562.73/27,843.63 = 5,415.21/x
  3. Step 3: Cross multiply
    18,562.73x = 27,843.63 × 5,415.21
  4. Step 4: Simplify right side
    18,562.73x = 150,779,228.33
  5. Step 5: Solve for x
    x = 150,779,228.33/18,562.73
  6. Step 6: Final answer
    x = 8,122.69

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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.