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Finding the Fourth Proportional to 19,953,622.80, 29,895,004.80 and 18,678,164.40

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Solution

The fourth proportional to 19,953,622.80, 29,895,004.80 and 18,678,164.40 is: 27,984,081.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,953,622.80 : 29,895,004.80 = 18,678,164.40 : x
  2. Step 2: Convert to fraction form
    19,953,622.80/29,895,004.80 = 18,678,164.40/x
  3. Step 3: Cross multiply
    19,953,622.80x = 29,895,004.80 × 18,678,164.40
  4. Step 4: Simplify right side
    19,953,622.80x = 558,383,814,393,189.06
  5. Step 5: Solve for x
    x = 558,383,814,393,189.06/19,953,622.80
  6. Step 6: Final answer
    x = 27,984,081.89

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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.