Home / 8,129.72-12,195.60-2,581.08

Finding the Fourth Proportional to 8,129.72, 12,195.60 and 2,581.08

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Solution

The fourth proportional to 8,129.72, 12,195.60 and 2,581.08 is: 3,871.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,129.72 : 12,195.60 = 2,581.08 : x
  2. Step 2: Convert to fraction form
    8,129.72/12,195.60 = 2,581.08/x
  3. Step 3: Cross multiply
    8,129.72x = 12,195.60 × 2,581.08
  4. Step 4: Simplify right side
    8,129.72x = 31,477,819.25
  5. Step 5: Solve for x
    x = 31,477,819.25/8,129.72
  6. Step 6: Final answer
    x = 3,871.95

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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.