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Finding the Fourth Proportional to 18,310.20, 27,450.09 and 7,788.30

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Solution

The fourth proportional to 18,310.20, 27,450.09 and 7,788.30 is: 11,675.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,310.20 : 27,450.09 = 7,788.30 : x
  2. Step 2: Convert to fraction form
    18,310.20/27,450.09 = 7,788.30/x
  3. Step 3: Cross multiply
    18,310.20x = 27,450.09 × 7,788.30
  4. Step 4: Simplify right side
    18,310.20x = 213,789,535.95
  5. Step 5: Solve for x
    x = 213,789,535.95/18,310.20
  6. Step 6: Final answer
    x = 11,675.98

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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.