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Finding the Fourth Proportional to 28,469.76, 42,706.88 and 7,692.96

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Solution

The fourth proportional to 28,469.76, 42,706.88 and 7,692.96 is: 11,540.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,469.76 : 42,706.88 = 7,692.96 : x
  2. Step 2: Convert to fraction form
    28,469.76/42,706.88 = 7,692.96/x
  3. Step 3: Cross multiply
    28,469.76x = 42,706.88 × 7,692.96
  4. Step 4: Simplify right side
    28,469.76x = 328,542,319.56
  5. Step 5: Solve for x
    x = 328,542,319.56/28,469.76
  6. Step 6: Final answer
    x = 11,540.05

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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.