Home / 20,972,219.41-28,942,560.71-11,679,789.42

Finding the Fourth Proportional to 20,972,219.41, 28,942,560.71 and 11,679,789.42

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Solution

The fourth proportional to 20,972,219.41, 28,942,560.71 and 11,679,789.42 is: 16,118,609.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,972,219.41 : 28,942,560.71 = 11,679,789.42 : x
  2. Step 2: Convert to fraction form
    20,972,219.41/28,942,560.71 = 11,679,789.42/x
  3. Step 3: Cross multiply
    20,972,219.41x = 28,942,560.71 × 11,679,789.42
  4. Step 4: Simplify right side
    20,972,219.41x = 338,043,014,368,365.69
  5. Step 5: Solve for x
    x = 338,043,014,368,365.69/20,972,219.41
  6. Step 6: Final answer
    x = 16,118,609.47

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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.