Home / 8,121.99-12,173.16-3,955.75

Finding the Fourth Proportional to 8,121.99, 12,173.16 and 3,955.75

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Solution

The fourth proportional to 8,121.99, 12,173.16 and 3,955.75 is: 5,928.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,121.99 : 12,173.16 = 3,955.75 : x
  2. Step 2: Convert to fraction form
    8,121.99/12,173.16 = 3,955.75/x
  3. Step 3: Cross multiply
    8,121.99x = 12,173.16 × 3,955.75
  4. Step 4: Simplify right side
    8,121.99x = 48,153,977.67
  5. Step 5: Solve for x
    x = 48,153,977.67/8,121.99
  6. Step 6: Final answer
    x = 5,928.84

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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.