Home / 20,605.78-30,885.97-13,481.46

Finding the Fourth Proportional to 20,605.78, 30,885.97 and 13,481.46

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Solution

The fourth proportional to 20,605.78, 30,885.97 and 13,481.46 is: 20,207.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,605.78 : 30,885.97 = 13,481.46 : x
  2. Step 2: Convert to fraction form
    20,605.78/30,885.97 = 13,481.46/x
  3. Step 3: Cross multiply
    20,605.78x = 30,885.97 × 13,481.46
  4. Step 4: Simplify right side
    20,605.78x = 416,388,009.64
  5. Step 5: Solve for x
    x = 416,388,009.64/20,605.78
  6. Step 6: Final answer
    x = 20,207.34

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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.