Home / 20,367.76-28,105.04-11,413.20

Finding the Fourth Proportional to 20,367.76, 28,105.04 and 11,413.20

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Solution

The fourth proportional to 20,367.76, 28,105.04 and 11,413.20 is: 15,748.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,367.76 : 28,105.04 = 11,413.20 : x
  2. Step 2: Convert to fraction form
    20,367.76/28,105.04 = 11,413.20/x
  3. Step 3: Cross multiply
    20,367.76x = 28,105.04 × 11,413.20
  4. Step 4: Simplify right side
    20,367.76x = 320,768,442.53
  5. Step 5: Solve for x
    x = 320,768,442.53/20,367.76
  6. Step 6: Final answer
    x = 15,748.83

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1.5x scale

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.