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Finding the Fourth Proportional to 18,681,855.30, 28,022,782.95 and 11,123,583.30

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Solution

The fourth proportional to 18,681,855.30, 28,022,782.95 and 11,123,583.30 is: 16,685,374.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,681,855.30 : 28,022,782.95 = 11,123,583.30 : x
  2. Step 2: Convert to fraction form
    18,681,855.30/28,022,782.95 = 11,123,583.30/x
  3. Step 3: Cross multiply
    18,681,855.30x = 28,022,782.95 × 11,123,583.30
  4. Step 4: Simplify right side
    18,681,855.30x = 311,713,760,442,144.75
  5. Step 5: Solve for x
    x = 311,713,760,442,144.75/18,681,855.30
  6. Step 6: Final answer
    x = 16,685,374.95

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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.