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Finding the Fourth Proportional to 18,711,262.60, 28,066,893.90 and 11,530,904.20

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Solution

The fourth proportional to 18,711,262.60, 28,066,893.90 and 11,530,904.20 is: 17,296,356.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,711,262.60 : 28,066,893.90 = 11,530,904.20 : x
  2. Step 2: Convert to fraction form
    18,711,262.60/28,066,893.90 = 11,530,904.20/x
  3. Step 3: Cross multiply
    18,711,262.60x = 28,066,893.90 × 11,530,904.20
  4. Step 4: Simplify right side
    18,711,262.60x = 323,636,664,752,464.31
  5. Step 5: Solve for x
    x = 323,636,664,752,464.31/18,711,262.60
  6. Step 6: Final answer
    x = 17,296,356.30

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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.