Home / 20,991.88-31,480.42-6,196.84

Finding the Fourth Proportional to 20,991.88, 31,480.42 and 6,196.84

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Solution

The fourth proportional to 20,991.88, 31,480.42 and 6,196.84 is: 9,293.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,991.88 : 31,480.42 = 6,196.84 : x
  2. Step 2: Convert to fraction form
    20,991.88/31,480.42 = 6,196.84/x
  3. Step 3: Cross multiply
    20,991.88x = 31,480.42 × 6,196.84
  4. Step 4: Simplify right side
    20,991.88x = 195,079,125.87
  5. Step 5: Solve for x
    x = 195,079,125.87/20,991.88
  6. Step 6: Final answer
    x = 9,293.08

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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.