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Finding the Fourth Proportional to 28,614.94, 42,908.79 and 8,893.78

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Solution

The fourth proportional to 28,614.94, 42,908.79 and 8,893.78 is: 13,336.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,614.94 : 42,908.79 = 8,893.78 : x
  2. Step 2: Convert to fraction form
    28,614.94/42,908.79 = 8,893.78/x
  3. Step 3: Cross multiply
    28,614.94x = 42,908.79 × 8,893.78
  4. Step 4: Simplify right side
    28,614.94x = 381,621,338.33
  5. Step 5: Solve for x
    x = 381,621,338.33/28,614.94
  6. Step 6: Final answer
    x = 13,336.44

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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.