Home / 20,890.23-28,821.69-11,814.18

Finding the Fourth Proportional to 20,890.23, 28,821.69 and 11,814.18

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Solution

The fourth proportional to 20,890.23, 28,821.69 and 11,814.18 is: 16,299.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,890.23 : 28,821.69 = 11,814.18 : x
  2. Step 2: Convert to fraction form
    20,890.23/28,821.69 = 11,814.18/x
  3. Step 3: Cross multiply
    20,890.23x = 28,821.69 × 11,814.18
  4. Step 4: Simplify right side
    20,890.23x = 340,504,633.56
  5. Step 5: Solve for x
    x = 340,504,633.56/20,890.23
  6. Step 6: Final answer
    x = 16,299.71

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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.