Home / 20,845.40-28,766.64-11,413.96

Finding the Fourth Proportional to 20,845.40, 28,766.64 and 11,413.96

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Solution

The fourth proportional to 20,845.40, 28,766.64 and 11,413.96 is: 15,751.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,845.40 : 28,766.64 = 11,413.96 : x
  2. Step 2: Convert to fraction form
    20,845.40/28,766.64 = 11,413.96/x
  3. Step 3: Cross multiply
    20,845.40x = 28,766.64 × 11,413.96
  4. Step 4: Simplify right side
    20,845.40x = 328,341,278.29
  5. Step 5: Solve for x
    x = 328,341,278.29/20,845.40
  6. Step 6: Final answer
    x = 15,751.26

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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.