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Finding the Fourth Proportional to 7,389,662.40, 11,082,938.40 and 3,129,969.60

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Solution

The fourth proportional to 7,389,662.40, 11,082,938.40 and 3,129,969.60 is: 4,694,295.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,389,662.40 : 11,082,938.40 = 3,129,969.60 : x
  2. Step 2: Convert to fraction form
    7,389,662.40/11,082,938.40 = 3,129,969.60/x
  3. Step 3: Cross multiply
    7,389,662.40x = 11,082,938.40 × 3,129,969.60
  4. Step 4: Simplify right side
    7,389,662.40x = 34,689,260,270,672.64
  5. Step 5: Solve for x
    x = 34,689,260,270,672.64/7,389,662.40
  6. Step 6: Final answer
    x = 4,694,295.68

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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.