Home / 20,551.89-28,361.64-11,120.45

Finding the Fourth Proportional to 20,551.89, 28,361.64 and 11,120.45

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Solution

The fourth proportional to 20,551.89, 28,361.64 and 11,120.45 is: 15,346.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,551.89 : 28,361.64 = 11,120.45 : x
  2. Step 2: Convert to fraction form
    20,551.89/28,361.64 = 11,120.45/x
  3. Step 3: Cross multiply
    20,551.89x = 28,361.64 × 11,120.45
  4. Step 4: Simplify right side
    20,551.89x = 315,394,214.84
  5. Step 5: Solve for x
    x = 315,394,214.84/20,551.89
  6. Step 6: Final answer
    x = 15,346.24

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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.