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Finding the Fourth Proportional to 40,491.05, 60,745.30 and 12,413.05

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Solution

The fourth proportional to 40,491.05, 60,745.30 and 12,413.05 is: 18,622.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,491.05 : 60,745.30 = 12,413.05 : x
  2. Step 2: Convert to fraction form
    40,491.05/60,745.30 = 12,413.05/x
  3. Step 3: Cross multiply
    40,491.05x = 60,745.30 × 12,413.05
  4. Step 4: Simplify right side
    40,491.05x = 754,034,263.27
  5. Step 5: Solve for x
    x = 754,034,263.27/40,491.05
  6. Step 6: Final answer
    x = 18,622.25

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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.