Home / 20,540,138.15-28,345,392.62-11,372,780.90

Finding the Fourth Proportional to 20,540,138.15, 28,345,392.62 and 11,372,780.90

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Solution

The fourth proportional to 20,540,138.15, 28,345,392.62 and 11,372,780.90 is: 15,694,438.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,540,138.15 : 28,345,392.62 = 11,372,780.90 : x
  2. Step 2: Convert to fraction form
    20,540,138.15/28,345,392.62 = 11,372,780.90/x
  3. Step 3: Cross multiply
    20,540,138.15x = 28,345,392.62 × 11,372,780.90
  4. Step 4: Simplify right side
    20,540,138.15x = 322,365,939,848,384.44
  5. Step 5: Solve for x
    x = 322,365,939,848,384.44/20,540,138.15
  6. Step 6: Final answer
    x = 15,694,438.74

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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.