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Finding the Fourth Proportional to 10,900.80, 16,351.20 and 2,692.80

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Solution

The fourth proportional to 10,900.80, 16,351.20 and 2,692.80 is: 4,039.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,900.80 : 16,351.20 = 2,692.80 : x
  2. Step 2: Convert to fraction form
    10,900.80/16,351.20 = 2,692.80/x
  3. Step 3: Cross multiply
    10,900.80x = 16,351.20 × 2,692.80
  4. Step 4: Simplify right side
    10,900.80x = 44,030,511.36
  5. Step 5: Solve for x
    x = 44,030,511.36/10,900.80
  6. Step 6: Final answer
    x = 4,039.20

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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.