Home / 8,005.19-12,007.79-2,161.80

Finding the Fourth Proportional to 8,005.19, 12,007.79 and 2,161.80

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Solution

The fourth proportional to 8,005.19, 12,007.79 and 2,161.80 is: 3,242.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,005.19 : 12,007.79 = 2,161.80 : x
  2. Step 2: Convert to fraction form
    8,005.19/12,007.79 = 2,161.80/x
  3. Step 3: Cross multiply
    8,005.19x = 12,007.79 × 2,161.80
  4. Step 4: Simplify right side
    8,005.19x = 25,958,440.42
  5. Step 5: Solve for x
    x = 25,958,440.42/8,005.19
  6. Step 6: Final answer
    x = 3,242.70

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Similar ratio
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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.