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Finding the Fourth Proportional to 18,622.94, 27,938.33 and 5,474.21

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Solution

The fourth proportional to 18,622.94, 27,938.33 and 5,474.21 is: 8,212.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,622.94 : 27,938.33 = 5,474.21 : x
  2. Step 2: Convert to fraction form
    18,622.94/27,938.33 = 5,474.21/x
  3. Step 3: Cross multiply
    18,622.94x = 27,938.33 × 5,474.21
  4. Step 4: Simplify right side
    18,622.94x = 152,940,285.47
  5. Step 5: Solve for x
    x = 152,940,285.47/18,622.94
  6. Step 6: Final answer
    x = 8,212.47

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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.