Home / 20,613.85-28,448.49-11,661.73

Finding the Fourth Proportional to 20,613.85, 28,448.49 and 11,661.73

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Solution

The fourth proportional to 20,613.85, 28,448.49 and 11,661.73 is: 16,093.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,613.85 : 28,448.49 = 11,661.73 : x
  2. Step 2: Convert to fraction form
    20,613.85/28,448.49 = 11,661.73/x
  3. Step 3: Cross multiply
    20,613.85x = 28,448.49 × 11,661.73
  4. Step 4: Simplify right side
    20,613.85x = 331,758,609.29
  5. Step 5: Solve for x
    x = 331,758,609.29/20,613.85
  6. Step 6: Final answer
    x = 16,093.97

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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.