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Finding the Fourth Proportional to 28,453.70, 42,680.52 and 7,391.97

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Solution

The fourth proportional to 28,453.70, 42,680.52 and 7,391.97 is: 11,087.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,453.70 : 42,680.52 = 7,391.97 : x
  2. Step 2: Convert to fraction form
    28,453.70/42,680.52 = 7,391.97/x
  3. Step 3: Cross multiply
    28,453.70x = 42,680.52 × 7,391.97
  4. Step 4: Simplify right side
    28,453.70x = 315,493,123.42
  5. Step 5: Solve for x
    x = 315,493,123.42/28,453.70
  6. Step 6: Final answer
    x = 11,087.95

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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.