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Finding the Fourth Proportional to 18,474.80, 27,705.80 and 7,378.52

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Solution

The fourth proportional to 18,474.80, 27,705.80 and 7,378.52 is: 11,065.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,474.80 : 27,705.80 = 7,378.52 : x
  2. Step 2: Convert to fraction form
    18,474.80/27,705.80 = 7,378.52/x
  3. Step 3: Cross multiply
    18,474.80x = 27,705.80 × 7,378.52
  4. Step 4: Simplify right side
    18,474.80x = 204,427,623.99
  5. Step 5: Solve for x
    x = 204,427,623.99/18,474.80
  6. Step 6: Final answer
    x = 11,065.22

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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.