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Finding the Fourth Proportional to 18,413.20, 27,619.80 and 10,118.80

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Solution

The fourth proportional to 18,413.20, 27,619.80 and 10,118.80 is: 15,178.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,413.20 : 27,619.80 = 10,118.80 : x
  2. Step 2: Convert to fraction form
    18,413.20/27,619.80 = 10,118.80/x
  3. Step 3: Cross multiply
    18,413.20x = 27,619.80 × 10,118.80
  4. Step 4: Simplify right side
    18,413.20x = 279,479,232.24
  5. Step 5: Solve for x
    x = 279,479,232.24/18,413.20
  6. Step 6: Final answer
    x = 15,178.20

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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.