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Finding the Fourth Proportional to 20,568.78, 30,846.78 and 7,419.44

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Solution

The fourth proportional to 20,568.78, 30,846.78 and 7,419.44 is: 11,126.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,568.78 : 30,846.78 = 7,419.44 : x
  2. Step 2: Convert to fraction form
    20,568.78/30,846.78 = 7,419.44/x
  3. Step 3: Cross multiply
    20,568.78x = 30,846.78 × 7,419.44
  4. Step 4: Simplify right side
    20,568.78x = 228,865,910.52
  5. Step 5: Solve for x
    x = 228,865,910.52/20,568.78
  6. Step 6: Final answer
    x = 11,126.86

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1.5x scale

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.