Home / 13,778.55-20,661.68-3,915.54

Finding the Fourth Proportional to 13,778.55, 20,661.68 and 3,915.54

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Solution

The fourth proportional to 13,778.55, 20,661.68 and 3,915.54 is: 5,871.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,778.55 : 20,661.68 = 3,915.54 : x
  2. Step 2: Convert to fraction form
    13,778.55/20,661.68 = 3,915.54/x
  3. Step 3: Cross multiply
    13,778.55x = 20,661.68 × 3,915.54
  4. Step 4: Simplify right side
    13,778.55x = 80,901,511.62
  5. Step 5: Solve for x
    x = 80,901,511.62/13,778.55
  6. Step 6: Final answer
    x = 5,871.55

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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.