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Finding the Fourth Proportional to 18,769,903.20, 28,133,859.60 and 10,686,751.20

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Solution

The fourth proportional to 18,769,903.20, 28,133,859.60 and 10,686,751.20 is: 16,018,173.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,769,903.20 : 28,133,859.60 = 10,686,751.20 : x
  2. Step 2: Convert to fraction form
    18,769,903.20/28,133,859.60 = 10,686,751.20/x
  3. Step 3: Cross multiply
    18,769,903.20x = 28,133,859.60 × 10,686,751.20
  4. Step 4: Simplify right side
    18,769,903.20x = 300,659,557,840,931.50
  5. Step 5: Solve for x
    x = 300,659,557,840,931.50/18,769,903.20
  6. Step 6: Final answer
    x = 16,018,173.06

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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.