Home / 20,424.82-28,185.52-12,480.34

Finding the Fourth Proportional to 20,424.82, 28,185.52 and 12,480.34

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Solution

The fourth proportional to 20,424.82, 28,185.52 and 12,480.34 is: 17,222.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,424.82 : 28,185.52 = 12,480.34 : x
  2. Step 2: Convert to fraction form
    20,424.82/28,185.52 = 12,480.34/x
  3. Step 3: Cross multiply
    20,424.82x = 28,185.52 × 12,480.34
  4. Step 4: Simplify right side
    20,424.82x = 351,764,872.68
  5. Step 5: Solve for x
    x = 351,764,872.68/20,424.82
  6. Step 6: Final answer
    x = 17,222.42

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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.