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Finding the Fourth Proportional to 18,954.69, 28,447.52 and 13,413.37

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Solution

The fourth proportional to 18,954.69, 28,447.52 and 13,413.37 is: 20,131.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,954.69 : 28,447.52 = 13,413.37 : x
  2. Step 2: Convert to fraction form
    18,954.69/28,447.52 = 13,413.37/x
  3. Step 3: Cross multiply
    18,954.69x = 28,447.52 × 13,413.37
  4. Step 4: Simplify right side
    18,954.69x = 381,577,111.34
  5. Step 5: Solve for x
    x = 381,577,111.34/18,954.69
  6. Step 6: Final answer
    x = 20,131.01

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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.