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Finding the Fourth Proportional to 28,480.89, 42,728.63 and 8,759.62

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Solution

The fourth proportional to 28,480.89, 42,728.63 and 8,759.62 is: 13,141.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,480.89 : 42,728.63 = 8,759.62 : x
  2. Step 2: Convert to fraction form
    28,480.89/42,728.63 = 8,759.62/x
  3. Step 3: Cross multiply
    28,480.89x = 42,728.63 × 8,759.62
  4. Step 4: Simplify right side
    28,480.89x = 374,286,561.92
  5. Step 5: Solve for x
    x = 374,286,561.92/28,480.89
  6. Step 6: Final answer
    x = 13,141.67

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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.