Home / 12,871.12-19,305.60-4,105.84

Finding the Fourth Proportional to 12,871.12, 19,305.60 and 4,105.84

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Solution

The fourth proportional to 12,871.12, 19,305.60 and 4,105.84 is: 6,158.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,871.12 : 19,305.60 = 4,105.84 : x
  2. Step 2: Convert to fraction form
    12,871.12/19,305.60 = 4,105.84/x
  3. Step 3: Cross multiply
    12,871.12x = 19,305.60 × 4,105.84
  4. Step 4: Simplify right side
    12,871.12x = 79,265,704.70
  5. Step 5: Solve for x
    x = 79,265,704.70/12,871.12
  6. Step 6: Final answer
    x = 6,158.42

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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.