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Finding the Fourth Proportional to 8,389,728.25, 11,578,713.34 and 5,128,451.98

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Solution

The fourth proportional to 8,389,728.25, 11,578,713.34 and 5,128,451.98 is: 7,077,806.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,389,728.25 : 11,578,713.34 = 5,128,451.98 : x
  2. Step 2: Convert to fraction form
    8,389,728.25/11,578,713.34 = 5,128,451.98/x
  3. Step 3: Cross multiply
    8,389,728.25x = 11,578,713.34 × 5,128,451.98
  4. Step 4: Simplify right side
    8,389,728.25x = 59,380,875,354,375.41
  5. Step 5: Solve for x
    x = 59,380,875,354,375.41/8,389,728.25
  6. Step 6: Final answer
    x = 7,077,806.76

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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.