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Finding the Fourth Proportional to 19,236, 28,855.44 and 10,912.80

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Solution

The fourth proportional to 19,236, 28,855.44 and 10,912.80 is: 16,370.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,236 : 28,855.44 = 10,912.80 : x
  2. Step 2: Convert to fraction form
    19,236/28,855.44 = 10,912.80/x
  3. Step 3: Cross multiply
    19,236x = 28,855.44 × 10,912.80
  4. Step 4: Simplify right side
    19,236x = 314,893,645.63
  5. Step 5: Solve for x
    x = 314,893,645.63/19,236
  6. Step 6: Final answer
    x = 16,370.02

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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.