Home / 20,375.78-28,118.30-11,423.26

Finding the Fourth Proportional to 20,375.78, 28,118.30 and 11,423.26

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Solution

The fourth proportional to 20,375.78, 28,118.30 and 11,423.26 is: 15,763.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,375.78 : 28,118.30 = 11,423.26 : x
  2. Step 2: Convert to fraction form
    20,375.78/28,118.30 = 11,423.26/x
  3. Step 3: Cross multiply
    20,375.78x = 28,118.30 × 11,423.26
  4. Step 4: Simplify right side
    20,375.78x = 321,202,651.66
  5. Step 5: Solve for x
    x = 321,202,651.66/20,375.78
  6. Step 6: Final answer
    x = 15,763.94

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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.