Home / 20,704.13-28,571.72-11,272.71

Finding the Fourth Proportional to 20,704.13, 28,571.72 and 11,272.71

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Solution

The fourth proportional to 20,704.13, 28,571.72 and 11,272.71 is: 15,556.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,704.13 : 28,571.72 = 11,272.71 : x
  2. Step 2: Convert to fraction form
    20,704.13/28,571.72 = 11,272.71/x
  3. Step 3: Cross multiply
    20,704.13x = 28,571.72 × 11,272.71
  4. Step 4: Simplify right side
    20,704.13x = 322,080,713.76
  5. Step 5: Solve for x
    x = 322,080,713.76/20,704.13
  6. Step 6: Final answer
    x = 15,556.35

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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.