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Finding the Fourth Proportional to 18,012.99, 27,020.51 and 4,866.41

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Solution

The fourth proportional to 18,012.99, 27,020.51 and 4,866.41 is: 7,299.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,012.99 : 27,020.51 = 4,866.41 : x
  2. Step 2: Convert to fraction form
    18,012.99/27,020.51 = 4,866.41/x
  3. Step 3: Cross multiply
    18,012.99x = 27,020.51 × 4,866.41
  4. Step 4: Simplify right side
    18,012.99x = 131,492,720.63
  5. Step 5: Solve for x
    x = 131,492,720.63/18,012.99
  6. Step 6: Final answer
    x = 7,299.88

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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.