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Finding the Fourth Proportional to 11,986.67, 17,980.01 and 4,491.95

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Solution

The fourth proportional to 11,986.67, 17,980.01 and 4,491.95 is: 6,737.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,986.67 : 17,980.01 = 4,491.95 : x
  2. Step 2: Convert to fraction form
    11,986.67/17,980.01 = 4,491.95/x
  3. Step 3: Cross multiply
    11,986.67x = 17,980.01 × 4,491.95
  4. Step 4: Simplify right side
    11,986.67x = 80,765,193.56
  5. Step 5: Solve for x
    x = 80,765,193.56/11,986.67
  6. Step 6: Final answer
    x = 6,737.92

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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.