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Finding the Fourth Proportional to 11,869,978.80, 17,804,968.20 and 11,744,007.60

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Solution

The fourth proportional to 11,869,978.80, 17,804,968.20 and 11,744,007.60 is: 17,616,011.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,869,978.80 : 17,804,968.20 = 11,744,007.60 : x
  2. Step 2: Convert to fraction form
    11,869,978.80/17,804,968.20 = 11,744,007.60/x
  3. Step 3: Cross multiply
    11,869,978.80x = 17,804,968.20 × 11,744,007.60
  4. Step 4: Simplify right side
    11,869,978.80x = 209,101,681,858,558.31
  5. Step 5: Solve for x
    x = 209,101,681,858,558.31/11,869,978.80
  6. Step 6: Final answer
    x = 17,616,011.40

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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.