Home / 8,119.80-12,182.90-3,188.60

Finding the Fourth Proportional to 8,119.80, 12,182.90 and 3,188.60

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Solution

The fourth proportional to 8,119.80, 12,182.90 and 3,188.60 is: 4,784.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,119.80 : 12,182.90 = 3,188.60 : x
  2. Step 2: Convert to fraction form
    8,119.80/12,182.90 = 3,188.60/x
  3. Step 3: Cross multiply
    8,119.80x = 12,182.90 × 3,188.60
  4. Step 4: Simplify right side
    8,119.80x = 38,846,394.94
  5. Step 5: Solve for x
    x = 38,846,394.94/8,119.80
  6. Step 6: Final answer
    x = 4,784.16

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1.5x scale

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.