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Finding the Fourth Proportional to 12,366.80, 18,511.80 and 8,910.80

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Solution

The fourth proportional to 12,366.80, 18,511.80 and 8,910.80 is: 13,338.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,366.80 : 18,511.80 = 8,910.80 : x
  2. Step 2: Convert to fraction form
    12,366.80/18,511.80 = 8,910.80/x
  3. Step 3: Cross multiply
    12,366.80x = 18,511.80 × 8,910.80
  4. Step 4: Simplify right side
    12,366.80x = 164,954,947.44
  5. Step 5: Solve for x
    x = 164,954,947.44/12,366.80
  6. Step 6: Final answer
    x = 13,338.53

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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.