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Finding the Fourth Proportional to 8,574.15, 12,868.47 and 3,383.67

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Solution

The fourth proportional to 8,574.15, 12,868.47 and 3,383.67 is: 5,078.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,574.15 : 12,868.47 = 3,383.67 : x
  2. Step 2: Convert to fraction form
    8,574.15/12,868.47 = 3,383.67/x
  3. Step 3: Cross multiply
    8,574.15x = 12,868.47 × 3,383.67
  4. Step 4: Simplify right side
    8,574.15x = 43,542,655.88
  5. Step 5: Solve for x
    x = 43,542,655.88/8,574.15
  6. Step 6: Final answer
    x = 5,078.36

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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.