Home / 3,128.42-4,692.72-1,811.36

Finding the Fourth Proportional to 3,128.42, 4,692.72 and 1,811.36

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Solution

The fourth proportional to 3,128.42, 4,692.72 and 1,811.36 is: 2,717.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.42 : 4,692.72 = 1,811.36 : x
  2. Step 2: Convert to fraction form
    3,128.42/4,692.72 = 1,811.36/x
  3. Step 3: Cross multiply
    3,128.42x = 4,692.72 × 1,811.36
  4. Step 4: Simplify right side
    3,128.42x = 8,500,205.30
  5. Step 5: Solve for x
    x = 8,500,205.30/3,128.42
  6. Step 6: Final answer
    x = 2,717.09

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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.