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Finding the Fourth Proportional to 18,711,215.10, 28,066,822.65 and 18,711,215.10

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Solution

The fourth proportional to 18,711,215.10, 28,066,822.65 and 18,711,215.10 is: 28,066,822.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,711,215.10 : 28,066,822.65 = 18,711,215.10 : x
  2. Step 2: Convert to fraction form
    18,711,215.10/28,066,822.65 = 18,711,215.10/x
  3. Step 3: Cross multiply
    18,711,215.10x = 28,066,822.65 × 18,711,215.10
  4. Step 4: Simplify right side
    18,711,215.10x = 525,164,355,777,702
  5. Step 5: Solve for x
    x = 525,164,355,777,702/18,711,215.10
  6. Step 6: Final answer
    x = 28,066,822.65

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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.