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Finding the Fourth Proportional to 18,819,691.80, 28,213,096.14 and 7,297,220.52

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Solution

The fourth proportional to 18,819,691.80, 28,213,096.14 and 7,297,220.52 is: 10,939,455.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,819,691.80 : 28,213,096.14 = 7,297,220.52 : x
  2. Step 2: Convert to fraction form
    18,819,691.80/28,213,096.14 = 7,297,220.52/x
  3. Step 3: Cross multiply
    18,819,691.80x = 28,213,096.14 × 7,297,220.52
  4. Step 4: Simplify right side
    18,819,691.80x = 205,877,184,085,540.78
  5. Step 5: Solve for x
    x = 205,877,184,085,540.78/18,819,691.80
  6. Step 6: Final answer
    x = 10,939,455.67

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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.