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Finding the Fourth Proportional to 18,692.88, 25,787.56 and 11,975.28

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Solution

The fourth proportional to 18,692.88, 25,787.56 and 11,975.28 is: 16,520.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,692.88 : 25,787.56 = 11,975.28 : x
  2. Step 2: Convert to fraction form
    18,692.88/25,787.56 = 11,975.28/x
  3. Step 3: Cross multiply
    18,692.88x = 25,787.56 × 11,975.28
  4. Step 4: Simplify right side
    18,692.88x = 308,813,251.52
  5. Step 5: Solve for x
    x = 308,813,251.52/18,692.88
  6. Step 6: Final answer
    x = 16,520.37

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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.