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Finding the Fourth Proportional to 20,392.85, 30,600.42 and 7,913.37

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Solution

The fourth proportional to 20,392.85, 30,600.42 and 7,913.37 is: 11,874.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,392.85 : 30,600.42 = 7,913.37 : x
  2. Step 2: Convert to fraction form
    20,392.85/30,600.42 = 7,913.37/x
  3. Step 3: Cross multiply
    20,392.85x = 30,600.42 × 7,913.37
  4. Step 4: Simplify right side
    20,392.85x = 242,152,292.61
  5. Step 5: Solve for x
    x = 242,152,292.61/20,392.85
  6. Step 6: Final answer
    x = 11,874.37

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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.