Home / 20,571.87-28,389.72-12,618.48

Finding the Fourth Proportional to 20,571.87, 28,389.72 and 12,618.48

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Solution

The fourth proportional to 20,571.87, 28,389.72 and 12,618.48 is: 17,413.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,571.87 : 28,389.72 = 12,618.48 : x
  2. Step 2: Convert to fraction form
    20,571.87/28,389.72 = 12,618.48/x
  3. Step 3: Cross multiply
    20,571.87x = 28,389.72 × 12,618.48
  4. Step 4: Simplify right side
    20,571.87x = 358,235,114.03
  5. Step 5: Solve for x
    x = 358,235,114.03/20,571.87
  6. Step 6: Final answer
    x = 17,413.83

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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.