Home / 20,375.57-28,118.87-11,423.22

Finding the Fourth Proportional to 20,375.57, 28,118.87 and 11,423.22

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Solution

The fourth proportional to 20,375.57, 28,118.87 and 11,423.22 is: 15,764.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,375.57 : 28,118.87 = 11,423.22 : x
  2. Step 2: Convert to fraction form
    20,375.57/28,118.87 = 11,423.22/x
  3. Step 3: Cross multiply
    20,375.57x = 28,118.87 × 11,423.22
  4. Step 4: Simplify right side
    20,375.57x = 321,208,023.88
  5. Step 5: Solve for x
    x = 321,208,023.88/20,375.57
  6. Step 6: Final answer
    x = 15,764.37

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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.