Home / 18,722.70-28,067.60-7,638.72

Finding the Fourth Proportional to 18,722.70, 28,067.60 and 7,638.72

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Solution

The fourth proportional to 18,722.70, 28,067.60 and 7,638.72 is: 11,451.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,722.70 : 28,067.60 = 7,638.72 : x
  2. Step 2: Convert to fraction form
    18,722.70/28,067.60 = 7,638.72/x
  3. Step 3: Cross multiply
    18,722.70x = 28,067.60 × 7,638.72
  4. Step 4: Simplify right side
    18,722.70x = 214,400,499.28
  5. Step 5: Solve for x
    x = 214,400,499.28/18,722.70
  6. Step 6: Final answer
    x = 11,451.37

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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.