Home / 13,781.56-20,668.92-5,458.72

Finding the Fourth Proportional to 13,781.56, 20,668.92 and 5,458.72

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Solution

The fourth proportional to 13,781.56, 20,668.92 and 5,458.72 is: 8,186.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,781.56 : 20,668.92 = 5,458.72 : x
  2. Step 2: Convert to fraction form
    13,781.56/20,668.92 = 5,458.72/x
  3. Step 3: Cross multiply
    13,781.56x = 20,668.92 × 5,458.72
  4. Step 4: Simplify right side
    13,781.56x = 112,825,846.98
  5. Step 5: Solve for x
    x = 112,825,846.98/13,781.56
  6. Step 6: Final answer
    x = 8,186.73

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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.