Home / 13,722.09-18,936.84-8,413.76

Finding the Fourth Proportional to 13,722.09, 18,936.84 and 8,413.76

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Solution

The fourth proportional to 13,722.09, 18,936.84 and 8,413.76 is: 11,611.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,722.09 : 18,936.84 = 8,413.76 : x
  2. Step 2: Convert to fraction form
    13,722.09/18,936.84 = 8,413.76/x
  3. Step 3: Cross multiply
    13,722.09x = 18,936.84 × 8,413.76
  4. Step 4: Simplify right side
    13,722.09x = 159,329,932.23
  5. Step 5: Solve for x
    x = 159,329,932.23/13,722.09
  6. Step 6: Final answer
    x = 11,611.20

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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.