Home / 20,551.92-28,361.72-11,120.56

Finding the Fourth Proportional to 20,551.92, 28,361.72 and 11,120.56

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Solution

The fourth proportional to 20,551.92, 28,361.72 and 11,120.56 is: 15,346.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,551.92 : 28,361.72 = 11,120.56 : x
  2. Step 2: Convert to fraction form
    20,551.92/28,361.72 = 11,120.56/x
  3. Step 3: Cross multiply
    20,551.92x = 28,361.72 × 11,120.56
  4. Step 4: Simplify right side
    20,551.92x = 315,398,208.96
  5. Step 5: Solve for x
    x = 315,398,208.96/20,551.92
  6. Step 6: Final answer
    x = 15,346.41

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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.