Home / 8,188.78-12,280.92-3,190.36

Finding the Fourth Proportional to 8,188.78, 12,280.92 and 3,190.36

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Solution

The fourth proportional to 8,188.78, 12,280.92 and 3,190.36 is: 4,784.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,188.78 : 12,280.92 = 3,190.36 : x
  2. Step 2: Convert to fraction form
    8,188.78/12,280.92 = 3,190.36/x
  3. Step 3: Cross multiply
    8,188.78x = 12,280.92 × 3,190.36
  4. Step 4: Simplify right side
    8,188.78x = 39,180,555.93
  5. Step 5: Solve for x
    x = 39,180,555.93/8,188.78
  6. Step 6: Final answer
    x = 4,784.66

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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.