Home / 10,786.20-16,180-3,390.98

Finding the Fourth Proportional to 10,786.20, 16,180 and 3,390.98

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Solution

The fourth proportional to 10,786.20, 16,180 and 3,390.98 is: 5,086.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,786.20 : 16,180 = 3,390.98 : x
  2. Step 2: Convert to fraction form
    10,786.20/16,180 = 3,390.98/x
  3. Step 3: Cross multiply
    10,786.20x = 16,180 × 3,390.98
  4. Step 4: Simplify right side
    10,786.20x = 54,866,056.40
  5. Step 5: Solve for x
    x = 54,866,056.40/10,786.20
  6. Step 6: Final answer
    x = 5,086.69

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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.