Home / 13,633.30-20,413.50-7,781.86

Finding the Fourth Proportional to 13,633.30, 20,413.50 and 7,781.86

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Solution

The fourth proportional to 13,633.30, 20,413.50 and 7,781.86 is: 11,651.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,633.30 : 20,413.50 = 7,781.86 : x
  2. Step 2: Convert to fraction form
    13,633.30/20,413.50 = 7,781.86/x
  3. Step 3: Cross multiply
    13,633.30x = 20,413.50 × 7,781.86
  4. Step 4: Simplify right side
    13,633.30x = 158,854,999.11
  5. Step 5: Solve for x
    x = 158,854,999.11/13,633.30
  6. Step 6: Final answer
    x = 11,651.98

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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.