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Finding the Fourth Proportional to 28,608.24, 42,922.08 and 8,889.60

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Solution

The fourth proportional to 28,608.24, 42,922.08 and 8,889.60 is: 13,337.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,608.24 : 42,922.08 = 8,889.60 : x
  2. Step 2: Convert to fraction form
    28,608.24/42,922.08 = 8,889.60/x
  3. Step 3: Cross multiply
    28,608.24x = 42,922.08 × 8,889.60
  4. Step 4: Simplify right side
    28,608.24x = 381,560,122.37
  5. Step 5: Solve for x
    x = 381,560,122.37/28,608.24
  6. Step 6: Final answer
    x = 13,337.42

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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.