Home / 8,120.48-12,182.30-3,189.80

Finding the Fourth Proportional to 8,120.48, 12,182.30 and 3,189.80

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Solution

The fourth proportional to 8,120.48, 12,182.30 and 3,189.80 is: 4,785.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,120.48 : 12,182.30 = 3,189.80 : x
  2. Step 2: Convert to fraction form
    8,120.48/12,182.30 = 3,189.80/x
  3. Step 3: Cross multiply
    8,120.48x = 12,182.30 × 3,189.80
  4. Step 4: Simplify right side
    8,120.48x = 38,859,023.68
  5. Step 5: Solve for x
    x = 38,859,023.68/8,120.48
  6. Step 6: Final answer
    x = 4,785.31

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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.