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Finding the Fourth Proportional to 18,413.99, 27,621.08 and 5,266.47

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Solution

The fourth proportional to 18,413.99, 27,621.08 and 5,266.47 is: 7,899.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,413.99 : 27,621.08 = 5,266.47 : x
  2. Step 2: Convert to fraction form
    18,413.99/27,621.08 = 5,266.47/x
  3. Step 3: Cross multiply
    18,413.99x = 27,621.08 × 5,266.47
  4. Step 4: Simplify right side
    18,413.99x = 145,465,589.19
  5. Step 5: Solve for x
    x = 145,465,589.19/18,413.99
  6. Step 6: Final answer
    x = 7,899.73

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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.