Home / 20,481.80-30,715.02-8,789

Finding the Fourth Proportional to 20,481.80, 30,715.02 and 8,789

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Solution

The fourth proportional to 20,481.80, 30,715.02 and 8,789 is: 13,180.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,481.80 : 30,715.02 = 8,789 : x
  2. Step 2: Convert to fraction form
    20,481.80/30,715.02 = 8,789/x
  3. Step 3: Cross multiply
    20,481.80x = 30,715.02 × 8,789
  4. Step 4: Simplify right side
    20,481.80x = 269,954,310.78
  5. Step 5: Solve for x
    x = 269,954,310.78/20,481.80
  6. Step 6: Final answer
    x = 13,180.20

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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.