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Finding the Fourth Proportional to 11,986.98, 17,980.47 and 4,198.02

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Solution

The fourth proportional to 11,986.98, 17,980.47 and 4,198.02 is: 6,297.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,986.98 : 17,980.47 = 4,198.02 : x
  2. Step 2: Convert to fraction form
    11,986.98/17,980.47 = 4,198.02/x
  3. Step 3: Cross multiply
    11,986.98x = 17,980.47 × 4,198.02
  4. Step 4: Simplify right side
    11,986.98x = 75,482,372.67
  5. Step 5: Solve for x
    x = 75,482,372.67/11,986.98
  6. Step 6: Final answer
    x = 6,297.03

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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.