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Finding the Fourth Proportional to 12,586.42, 18,879.50 and 3,352.42

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Solution

The fourth proportional to 12,586.42, 18,879.50 and 3,352.42 is: 5,028.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,586.42 : 18,879.50 = 3,352.42 : x
  2. Step 2: Convert to fraction form
    12,586.42/18,879.50 = 3,352.42/x
  3. Step 3: Cross multiply
    12,586.42x = 18,879.50 × 3,352.42
  4. Step 4: Simplify right side
    12,586.42x = 63,292,013.39
  5. Step 5: Solve for x
    x = 63,292,013.39/12,586.42
  6. Step 6: Final answer
    x = 5,028.60

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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.