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Finding the Fourth Proportional to 18,716,799.60, 28,019,212.20 and 17,609,497.20

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Solution

The fourth proportional to 18,716,799.60, 28,019,212.20 and 17,609,497.20 is: 26,361,570.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,716,799.60 : 28,019,212.20 = 17,609,497.20 : x
  2. Step 2: Convert to fraction form
    18,716,799.60/28,019,212.20 = 17,609,497.20/x
  3. Step 3: Cross multiply
    18,716,799.60x = 28,019,212.20 × 17,609,497.20
  4. Step 4: Simplify right side
    18,716,799.60x = 493,404,238,782,105.81
  5. Step 5: Solve for x
    x = 493,404,238,782,105.81/18,716,799.60
  6. Step 6: Final answer
    x = 26,361,570.85

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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.