Home / 20,879.46-28,812.45-11,926.43

Finding the Fourth Proportional to 20,879.46, 28,812.45 and 11,926.43

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Solution

The fourth proportional to 20,879.46, 28,812.45 and 11,926.43 is: 16,457.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,879.46 : 28,812.45 = 11,926.43 : x
  2. Step 2: Convert to fraction form
    20,879.46/28,812.45 = 11,926.43/x
  3. Step 3: Cross multiply
    20,879.46x = 28,812.45 × 11,926.43
  4. Step 4: Simplify right side
    20,879.46x = 343,629,523.99
  5. Step 5: Solve for x
    x = 343,629,523.99/20,879.46
  6. Step 6: Final answer
    x = 16,457.78

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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.