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Finding the Fourth Proportional to 28,189.66, 42,286.98 and 7,413.16

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Solution

The fourth proportional to 28,189.66, 42,286.98 and 7,413.16 is: 11,120.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,189.66 : 42,286.98 = 7,413.16 : x
  2. Step 2: Convert to fraction form
    28,189.66/42,286.98 = 7,413.16/x
  3. Step 3: Cross multiply
    28,189.66x = 42,286.98 × 7,413.16
  4. Step 4: Simplify right side
    28,189.66x = 313,479,937.22
  5. Step 5: Solve for x
    x = 313,479,937.22/28,189.66
  6. Step 6: Final answer
    x = 11,120.39

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1.5x scale

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.