Home / 8,121.61-12,172.60-3,955.37

Finding the Fourth Proportional to 8,121.61, 12,172.60 and 3,955.37

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Solution

The fourth proportional to 8,121.61, 12,172.60 and 3,955.37 is: 5,928.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,121.61 : 12,172.60 = 3,955.37 : x
  2. Step 2: Convert to fraction form
    8,121.61/12,172.60 = 3,955.37/x
  3. Step 3: Cross multiply
    8,121.61x = 12,172.60 × 3,955.37
  4. Step 4: Simplify right side
    8,121.61x = 48,147,172.24
  5. Step 5: Solve for x
    x = 48,147,172.24/8,121.61
  6. Step 6: Final answer
    x = 5,928.28

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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.