Home / 20,619.85-30,917.48-7,467.78

Finding the Fourth Proportional to 20,619.85, 30,917.48 and 7,467.78

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Solution

The fourth proportional to 20,619.85, 30,917.48 and 7,467.78 is: 11,197.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,619.85 : 30,917.48 = 7,467.78 : x
  2. Step 2: Convert to fraction form
    20,619.85/30,917.48 = 7,467.78/x
  3. Step 3: Cross multiply
    20,619.85x = 30,917.48 × 7,467.78
  4. Step 4: Simplify right side
    20,619.85x = 230,884,938.79
  5. Step 5: Solve for x
    x = 230,884,938.79/20,619.85
  6. Step 6: Final answer
    x = 11,197.22

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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.