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Finding the Fourth Proportional to 18,775.73, 28,171.44 and 8,240.31

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Solution

The fourth proportional to 18,775.73, 28,171.44 and 8,240.31 is: 12,363.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,775.73 : 28,171.44 = 8,240.31 : x
  2. Step 2: Convert to fraction form
    18,775.73/28,171.44 = 8,240.31/x
  3. Step 3: Cross multiply
    18,775.73x = 28,171.44 × 8,240.31
  4. Step 4: Simplify right side
    18,775.73x = 232,141,398.75
  5. Step 5: Solve for x
    x = 232,141,398.75/18,775.73
  6. Step 6: Final answer
    x = 12,363.91

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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.