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Finding the Fourth Proportional to 18,682,938.40, 28,036,217.40 and 11,006,568.40

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Solution

The fourth proportional to 18,682,938.40, 28,036,217.40 and 11,006,568.40 is: 16,516,810.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,682,938.40 : 28,036,217.40 = 11,006,568.40 : x
  2. Step 2: Convert to fraction form
    18,682,938.40/28,036,217.40 = 11,006,568.40/x
  3. Step 3: Cross multiply
    18,682,938.40x = 28,036,217.40 × 11,006,568.40
  4. Step 4: Simplify right side
    18,682,938.40x = 308,582,544,490,370.12
  5. Step 5: Solve for x
    x = 308,582,544,490,370.12/18,682,938.40
  6. Step 6: Final answer
    x = 16,516,810.04

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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.