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Finding the Fourth Proportional to 18,907.43, 28,324.28 and 10,990.49

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Solution

The fourth proportional to 18,907.43, 28,324.28 and 10,990.49 is: 16,464.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,907.43 : 28,324.28 = 10,990.49 : x
  2. Step 2: Convert to fraction form
    18,907.43/28,324.28 = 10,990.49/x
  3. Step 3: Cross multiply
    18,907.43x = 28,324.28 × 10,990.49
  4. Step 4: Simplify right side
    18,907.43x = 311,297,601.95
  5. Step 5: Solve for x
    x = 311,297,601.95/18,907.43
  6. Step 6: Final answer
    x = 16,464.30

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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.