Home / 7,171.21-9,896.39-3,984.80

Finding the Fourth Proportional to 7,171.21, 9,896.39 and 3,984.80

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Solution

The fourth proportional to 7,171.21, 9,896.39 and 3,984.80 is: 5,499.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,171.21 : 9,896.39 = 3,984.80 : x
  2. Step 2: Convert to fraction form
    7,171.21/9,896.39 = 3,984.80/x
  3. Step 3: Cross multiply
    7,171.21x = 9,896.39 × 3,984.80
  4. Step 4: Simplify right side
    7,171.21x = 39,435,085.39
  5. Step 5: Solve for x
    x = 39,435,085.39/7,171.21
  6. Step 6: Final answer
    x = 5,499.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.