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Finding the Fourth Proportional to 18,859.68, 28,290.33 and 10,532.88

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Solution

The fourth proportional to 18,859.68, 28,290.33 and 10,532.88 is: 15,799.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,859.68 : 28,290.33 = 10,532.88 : x
  2. Step 2: Convert to fraction form
    18,859.68/28,290.33 = 10,532.88/x
  3. Step 3: Cross multiply
    18,859.68x = 28,290.33 × 10,532.88
  4. Step 4: Simplify right side
    18,859.68x = 297,978,651.05
  5. Step 5: Solve for x
    x = 297,978,651.05/18,859.68
  6. Step 6: Final answer
    x = 15,799.77

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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.