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Finding the Fourth Proportional to 15,200,803.13, 20,978,608.62 and 8,675,408.86

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Solution

The fourth proportional to 15,200,803.13, 20,978,608.62 and 8,675,408.86 is: 11,972,920.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,200,803.13 : 20,978,608.62 = 8,675,408.86 : x
  2. Step 2: Convert to fraction form
    15,200,803.13/20,978,608.62 = 8,675,408.86/x
  3. Step 3: Cross multiply
    15,200,803.13x = 20,978,608.62 × 8,675,408.86
  4. Step 4: Simplify right side
    15,200,803.13x = 181,998,007,092,420.38
  5. Step 5: Solve for x
    x = 181,998,007,092,420.38/15,200,803.13
  6. Step 6: Final answer
    x = 11,972,920.48

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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.