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Finding the Fourth Proportional to 19,957,115.10, 29,935,672.65 and 12,782,661.60

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Solution

The fourth proportional to 19,957,115.10, 29,935,672.65 and 12,782,661.60 is: 19,173,992.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,957,115.10 : 29,935,672.65 = 12,782,661.60 : x
  2. Step 2: Convert to fraction form
    19,957,115.10/29,935,672.65 = 12,782,661.60/x
  3. Step 3: Cross multiply
    19,957,115.10x = 29,935,672.65 × 12,782,661.60
  4. Step 4: Simplify right side
    19,957,115.10x = 382,657,573,253,325.19
  5. Step 5: Solve for x
    x = 382,657,573,253,325.19/19,957,115.10
  6. Step 6: Final answer
    x = 19,173,992.40

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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.