Home / 12,121,692.70-18,183,413.85-7,319,040.70

Finding the Fourth Proportional to 12,121,692.70, 18,183,413.85 and 7,319,040.70

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Solution

The fourth proportional to 12,121,692.70, 18,183,413.85 and 7,319,040.70 is: 10,979,089.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121,692.70 : 18,183,413.85 = 7,319,040.70 : x
  2. Step 2: Convert to fraction form
    12,121,692.70/18,183,413.85 = 7,319,040.70/x
  3. Step 3: Cross multiply
    12,121,692.70x = 18,183,413.85 × 7,319,040.70
  4. Step 4: Simplify right side
    12,121,692.70x = 133,085,146,033,093.70
  5. Step 5: Solve for x
    x = 133,085,146,033,093.70/12,121,692.70
  6. Step 6: Final answer
    x = 10,979,089.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.