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Finding the Fourth Proportional to 28,872.25, 39,843.83 and 15,624.25

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Solution

The fourth proportional to 28,872.25, 39,843.83 and 15,624.25 is: 21,561.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,872.25 : 39,843.83 = 15,624.25 : x
  2. Step 2: Convert to fraction form
    28,872.25/39,843.83 = 15,624.25/x
  3. Step 3: Cross multiply
    28,872.25x = 39,843.83 × 15,624.25
  4. Step 4: Simplify right side
    28,872.25x = 622,529,960.88
  5. Step 5: Solve for x
    x = 622,529,960.88/28,872.25
  6. Step 6: Final answer
    x = 21,561.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.