Home / 20,960.58-31,438.44-7,811.49

Finding the Fourth Proportional to 20,960.58, 31,438.44 and 7,811.49

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Solution

The fourth proportional to 20,960.58, 31,438.44 and 7,811.49 is: 11,716.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,960.58 : 31,438.44 = 7,811.49 : x
  2. Step 2: Convert to fraction form
    20,960.58/31,438.44 = 7,811.49/x
  3. Step 3: Cross multiply
    20,960.58x = 31,438.44 × 7,811.49
  4. Step 4: Simplify right side
    20,960.58x = 245,581,059.68
  5. Step 5: Solve for x
    x = 245,581,059.68/20,960.58
  6. Step 6: Final answer
    x = 11,716.33

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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.