Home / 12,880.86-19,289.60-6,285.78

Finding the Fourth Proportional to 12,880.86, 19,289.60 and 6,285.78

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Solution

The fourth proportional to 12,880.86, 19,289.60 and 6,285.78 is: 9,413.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,880.86 : 19,289.60 = 6,285.78 : x
  2. Step 2: Convert to fraction form
    12,880.86/19,289.60 = 6,285.78/x
  3. Step 3: Cross multiply
    12,880.86x = 19,289.60 × 6,285.78
  4. Step 4: Simplify right side
    12,880.86x = 121,250,085.44
  5. Step 5: Solve for x
    x = 121,250,085.44/12,880.86
  6. Step 6: Final answer
    x = 9,413.20

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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.