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Finding the Fourth Proportional to 28,105.68, 42,163.68 and 9,383.95

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Solution

The fourth proportional to 28,105.68, 42,163.68 and 9,383.95 is: 14,077.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,105.68 : 42,163.68 = 9,383.95 : x
  2. Step 2: Convert to fraction form
    28,105.68/42,163.68 = 9,383.95/x
  3. Step 3: Cross multiply
    28,105.68x = 42,163.68 × 9,383.95
  4. Step 4: Simplify right side
    28,105.68x = 395,661,654.12
  5. Step 5: Solve for x
    x = 395,661,654.12/28,105.68
  6. Step 6: Final answer
    x = 14,077.64

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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.