Home / 20,857.08-28,782.61-11,296.76

Finding the Fourth Proportional to 20,857.08, 28,782.61 and 11,296.76

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Solution

The fourth proportional to 20,857.08, 28,782.61 and 11,296.76 is: 15,589.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,857.08 : 28,782.61 = 11,296.76 : x
  2. Step 2: Convert to fraction form
    20,857.08/28,782.61 = 11,296.76/x
  3. Step 3: Cross multiply
    20,857.08x = 28,782.61 × 11,296.76
  4. Step 4: Simplify right side
    20,857.08x = 325,150,065.19
  5. Step 5: Solve for x
    x = 325,150,065.19/20,857.08
  6. Step 6: Final answer
    x = 15,589.43

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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.