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Finding the Fourth Proportional to 13,993,942.80, 21,000,245.40 and 6,417,008.40

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Solution

The fourth proportional to 13,993,942.80, 21,000,245.40 and 6,417,008.40 is: 9,629,791.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,993,942.80 : 21,000,245.40 = 6,417,008.40 : x
  2. Step 2: Convert to fraction form
    13,993,942.80/21,000,245.40 = 6,417,008.40/x
  3. Step 3: Cross multiply
    13,993,942.80x = 21,000,245.40 × 6,417,008.40
  4. Step 4: Simplify right side
    13,993,942.80x = 134,758,751,133,861.36
  5. Step 5: Solve for x
    x = 134,758,751,133,861.36/13,993,942.80
  6. Step 6: Final answer
    x = 9,629,791.48

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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.