Home / 20,123.20-30,213.60-11,375.20

Finding the Fourth Proportional to 20,123.20, 30,213.60 and 11,375.20

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Solution

The fourth proportional to 20,123.20, 30,213.60 and 11,375.20 is: 17,079.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,123.20 : 30,213.60 = 11,375.20 : x
  2. Step 2: Convert to fraction form
    20,123.20/30,213.60 = 11,375.20/x
  3. Step 3: Cross multiply
    20,123.20x = 30,213.60 × 11,375.20
  4. Step 4: Simplify right side
    20,123.20x = 343,685,742.72
  5. Step 5: Solve for x
    x = 343,685,742.72/20,123.20
  6. Step 6: Final answer
    x = 17,079.08

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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.