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Finding the Fourth Proportional to 21,978,601.80, 32,967,902.70 and 11,229,059.40

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Solution

The fourth proportional to 21,978,601.80, 32,967,902.70 and 11,229,059.40 is: 16,843,589.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,978,601.80 : 32,967,902.70 = 11,229,059.40 : x
  2. Step 2: Convert to fraction form
    21,978,601.80/32,967,902.70 = 11,229,059.40/x
  3. Step 3: Cross multiply
    21,978,601.80x = 32,967,902.70 × 11,229,059.40
  4. Step 4: Simplify right side
    21,978,601.80x = 370,198,537,711,720.38
  5. Step 5: Solve for x
    x = 370,198,537,711,720.38/21,978,601.80
  6. Step 6: Final answer
    x = 16,843,589.10

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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.