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Finding the Fourth Proportional to 18,879,978.22, 28,335,100.96 and 9,784,676.11

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Solution

The fourth proportional to 18,879,978.22, 28,335,100.96 and 9,784,676.11 is: 14,684,857.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,879,978.22 : 28,335,100.96 = 9,784,676.11 : x
  2. Step 2: Convert to fraction form
    18,879,978.22/28,335,100.96 = 9,784,676.11/x
  3. Step 3: Cross multiply
    18,879,978.22x = 28,335,100.96 × 9,784,676.11
  4. Step 4: Simplify right side
    18,879,978.22x = 277,249,785,437,750.06
  5. Step 5: Solve for x
    x = 277,249,785,437,750.06/18,879,978.22
  6. Step 6: Final answer
    x = 14,684,857.27

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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.