Home / 8,129.80-12,199.22-3,969.86

Finding the Fourth Proportional to 8,129.80, 12,199.22 and 3,969.86

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Solution

The fourth proportional to 8,129.80, 12,199.22 and 3,969.86 is: 5,957.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,129.80 : 12,199.22 = 3,969.86 : x
  2. Step 2: Convert to fraction form
    8,129.80/12,199.22 = 3,969.86/x
  3. Step 3: Cross multiply
    8,129.80x = 12,199.22 × 3,969.86
  4. Step 4: Simplify right side
    8,129.80x = 48,429,195.51
  5. Step 5: Solve for x
    x = 48,429,195.51/8,129.80
  6. Step 6: Final answer
    x = 5,957.00

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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.