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Finding the Fourth Proportional to 11,577,581.20, 15,978,018.36 and 6,422,604.40

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Solution

The fourth proportional to 11,577,581.20, 15,978,018.36 and 6,422,604.40 is: 8,863,724.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,577,581.20 : 15,978,018.36 = 6,422,604.40 : x
  2. Step 2: Convert to fraction form
    11,577,581.20/15,978,018.36 = 6,422,604.40/x
  3. Step 3: Cross multiply
    11,577,581.20x = 15,978,018.36 × 6,422,604.40
  4. Step 4: Simplify right side
    11,577,581.20x = 102,620,491,022,216.78
  5. Step 5: Solve for x
    x = 102,620,491,022,216.78/11,577,581.20
  6. Step 6: Final answer
    x = 8,863,724.58

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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.