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Finding the Fourth Proportional to 19,310,469.20, 28,965,703.80 and 12,592,005.20

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Solution

The fourth proportional to 19,310,469.20, 28,965,703.80 and 12,592,005.20 is: 18,888,007.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,310,469.20 : 28,965,703.80 = 12,592,005.20 : x
  2. Step 2: Convert to fraction form
    19,310,469.20/28,965,703.80 = 12,592,005.20/x
  3. Step 3: Cross multiply
    19,310,469.20x = 28,965,703.80 × 12,592,005.20
  4. Step 4: Simplify right side
    19,310,469.20x = 364,736,292,871,259.75
  5. Step 5: Solve for x
    x = 364,736,292,871,259.75/19,310,469.20
  6. Step 6: Final answer
    x = 18,888,007.80

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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.