Home / 11,986.55-17,985.89-8,082.75

Finding the Fourth Proportional to 11,986.55, 17,985.89 and 8,082.75

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Solution

The fourth proportional to 11,986.55, 17,985.89 and 8,082.75 is: 12,128.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,986.55 : 17,985.89 = 8,082.75 : x
  2. Step 2: Convert to fraction form
    11,986.55/17,985.89 = 8,082.75/x
  3. Step 3: Cross multiply
    11,986.55x = 17,985.89 × 8,082.75
  4. Step 4: Simplify right side
    11,986.55x = 145,375,452.40
  5. Step 5: Solve for x
    x = 145,375,452.40/11,986.55
  6. Step 6: Final answer
    x = 12,128.21

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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.