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Finding the Fourth Proportional to 14,978,122.87, 20,669,608.59 and 8,362,812.94

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Solution

The fourth proportional to 14,978,122.87, 20,669,608.59 and 8,362,812.94 is: 11,540,569.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,978,122.87 : 20,669,608.59 = 8,362,812.94 : x
  2. Step 2: Convert to fraction form
    14,978,122.87/20,669,608.59 = 8,362,812.94/x
  3. Step 3: Cross multiply
    14,978,122.87x = 20,669,608.59 × 8,362,812.94
  4. Step 4: Simplify right side
    14,978,122.87x = 172,856,070,181,187.16
  5. Step 5: Solve for x
    x = 172,856,070,181,187.16/14,978,122.87
  6. Step 6: Final answer
    x = 11,540,569.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.