Home / 20,468.08-28,245.72-11,515.60

Finding the Fourth Proportional to 20,468.08, 28,245.72 and 11,515.60

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Solution

The fourth proportional to 20,468.08, 28,245.72 and 11,515.60 is: 15,891.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,468.08 : 28,245.72 = 11,515.60 : x
  2. Step 2: Convert to fraction form
    20,468.08/28,245.72 = 11,515.60/x
  3. Step 3: Cross multiply
    20,468.08x = 28,245.72 × 11,515.60
  4. Step 4: Simplify right side
    20,468.08x = 325,266,413.23
  5. Step 5: Solve for x
    x = 325,266,413.23/20,468.08
  6. Step 6: Final answer
    x = 15,891.40

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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.