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Finding the Fourth Proportional to 20,558.53, 30,834.28 and 7,408.99

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Solution

The fourth proportional to 20,558.53, 30,834.28 and 7,408.99 is: 11,112.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,558.53 : 30,834.28 = 7,408.99 : x
  2. Step 2: Convert to fraction form
    20,558.53/30,834.28 = 7,408.99/x
  3. Step 3: Cross multiply
    20,558.53x = 30,834.28 × 7,408.99
  4. Step 4: Simplify right side
    20,558.53x = 228,450,872.18
  5. Step 5: Solve for x
    x = 228,450,872.18/20,558.53
  6. Step 6: Final answer
    x = 11,112.22

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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.