Home / 12,078.35-18,115.70-5,413.47

Finding the Fourth Proportional to 12,078.35, 18,115.70 and 5,413.47

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Solution

The fourth proportional to 12,078.35, 18,115.70 and 5,413.47 is: 8,119.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,078.35 : 18,115.70 = 5,413.47 : x
  2. Step 2: Convert to fraction form
    12,078.35/18,115.70 = 5,413.47/x
  3. Step 3: Cross multiply
    12,078.35x = 18,115.70 × 5,413.47
  4. Step 4: Simplify right side
    12,078.35x = 98,068,771.41
  5. Step 5: Solve for x
    x = 98,068,771.41/12,078.35
  6. Step 6: Final answer
    x = 8,119.39

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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.