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Finding the Fourth Proportional to 7,992,472.80, 11,978,867.70 and 5,433,682.80

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Solution

The fourth proportional to 7,992,472.80, 11,978,867.70 and 5,433,682.80 is: 8,143,833.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,992,472.80 : 11,978,867.70 = 5,433,682.80 : x
  2. Step 2: Convert to fraction form
    7,992,472.80/11,978,867.70 = 5,433,682.80/x
  3. Step 3: Cross multiply
    7,992,472.80x = 11,978,867.70 × 5,433,682.80
  4. Step 4: Simplify right side
    7,992,472.80x = 65,089,367,384,965.55
  5. Step 5: Solve for x
    x = 65,089,367,384,965.55/7,992,472.80
  6. Step 6: Final answer
    x = 8,143,833.46

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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.