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Finding the Fourth Proportional to 12,889,555.88, 17,782,552.78 and 7,379,986.20

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Solution

The fourth proportional to 12,889,555.88, 17,782,552.78 and 7,379,986.20 is: 10,181,498.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,889,555.88 : 17,782,552.78 = 7,379,986.20 : x
  2. Step 2: Convert to fraction form
    12,889,555.88/17,782,552.78 = 7,379,986.20/x
  3. Step 3: Cross multiply
    12,889,555.88x = 17,782,552.78 × 7,379,986.20
  4. Step 4: Simplify right side
    12,889,555.88x = 131,234,994,117,171.64
  5. Step 5: Solve for x
    x = 131,234,994,117,171.64/12,889,555.88
  6. Step 6: Final answer
    x = 10,181,498.52

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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.