Home / 8,139.07-12,209.10-3,982.60

Finding the Fourth Proportional to 8,139.07, 12,209.10 and 3,982.60

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Solution

The fourth proportional to 8,139.07, 12,209.10 and 3,982.60 is: 5,974.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,139.07 : 12,209.10 = 3,982.60 : x
  2. Step 2: Convert to fraction form
    8,139.07/12,209.10 = 3,982.60/x
  3. Step 3: Cross multiply
    8,139.07x = 12,209.10 × 3,982.60
  4. Step 4: Simplify right side
    8,139.07x = 48,623,961.66
  5. Step 5: Solve for x
    x = 48,623,961.66/8,139.07
  6. Step 6: Final answer
    x = 5,974.14

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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.