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Finding the Fourth Proportional to 28,602.20, 42,908.97 and 8,879.91

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Solution

The fourth proportional to 28,602.20, 42,908.97 and 8,879.91 is: 13,321.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,602.20 : 42,908.97 = 8,879.91 : x
  2. Step 2: Convert to fraction form
    28,602.20/42,908.97 = 8,879.91/x
  3. Step 3: Cross multiply
    28,602.20x = 42,908.97 × 8,879.91
  4. Step 4: Simplify right side
    28,602.20x = 381,027,791.79
  5. Step 5: Solve for x
    x = 381,027,791.79/28,602.20
  6. Step 6: Final answer
    x = 13,321.63

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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.