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Finding the Fourth Proportional to 13,608,543.70, 20,412,815.55 and 13,608,543.70

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Solution

The fourth proportional to 13,608,543.70, 20,412,815.55 and 13,608,543.70 is: 20,412,815.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,608,543.70 : 20,412,815.55 = 13,608,543.70 : x
  2. Step 2: Convert to fraction form
    13,608,543.70/20,412,815.55 = 13,608,543.70/x
  3. Step 3: Cross multiply
    13,608,543.70x = 20,412,815.55 × 13,608,543.70
  4. Step 4: Simplify right side
    13,608,543.70x = 277,788,692,452,214.53
  5. Step 5: Solve for x
    x = 277,788,692,452,214.53/13,608,543.70
  6. Step 6: Final answer
    x = 20,412,815.55

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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.