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Finding the Fourth Proportional to 28,469.35, 42,704.09 and 8,747.77

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Solution

The fourth proportional to 28,469.35, 42,704.09 and 8,747.77 is: 13,121.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,469.35 : 42,704.09 = 8,747.77 : x
  2. Step 2: Convert to fraction form
    28,469.35/42,704.09 = 8,747.77/x
  3. Step 3: Cross multiply
    28,469.35x = 42,704.09 × 8,747.77
  4. Step 4: Simplify right side
    28,469.35x = 373,565,557.38
  5. Step 5: Solve for x
    x = 373,565,557.38/28,469.35
  6. Step 6: Final answer
    x = 13,121.67

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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.