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Finding the Fourth Proportional to 18,994,133.70, 28,491,200.55 and 8,203,913.10

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Solution

The fourth proportional to 18,994,133.70, 28,491,200.55 and 8,203,913.10 is: 12,305,869.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,994,133.70 : 28,491,200.55 = 8,203,913.10 : x
  2. Step 2: Convert to fraction form
    18,994,133.70/28,491,200.55 = 8,203,913.10/x
  3. Step 3: Cross multiply
    18,994,133.70x = 28,491,200.55 × 8,203,913.10
  4. Step 4: Simplify right side
    18,994,133.70x = 233,739,333,426,872.19
  5. Step 5: Solve for x
    x = 233,739,333,426,872.19/18,994,133.70
  6. Step 6: Final answer
    x = 12,305,869.65

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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.