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Finding the Fourth Proportional to 28,212.39, 42,321.02 and 27,828.45

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Solution

The fourth proportional to 28,212.39, 42,321.02 and 27,828.45 is: 41,745.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,212.39 : 42,321.02 = 27,828.45 : x
  2. Step 2: Convert to fraction form
    28,212.39/42,321.02 = 27,828.45/x
  3. Step 3: Cross multiply
    28,212.39x = 42,321.02 × 27,828.45
  4. Step 4: Simplify right side
    28,212.39x = 1,177,728,249.88
  5. Step 5: Solve for x
    x = 1,177,728,249.88/28,212.39
  6. Step 6: Final answer
    x = 41,745.07

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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.