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Finding the Fourth Proportional to 19,821,590.20, 27,813,999.20 and 19,821,590.20

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Solution

The fourth proportional to 19,821,590.20, 27,813,999.20 and 19,821,590.20 is: 27,813,999.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,821,590.20 : 27,813,999.20 = 19,821,590.20 : x
  2. Step 2: Convert to fraction form
    19,821,590.20/27,813,999.20 = 19,821,590.20/x
  3. Step 3: Cross multiply
    19,821,590.20x = 27,813,999.20 × 19,821,590.20
  4. Step 4: Simplify right side
    19,821,590.20x = 551,317,693,965,527.81
  5. Step 5: Solve for x
    x = 551,317,693,965,527.81/19,821,590.20
  6. Step 6: Final answer
    x = 27,813,999.20

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.