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Finding the Fourth Proportional to 13,361.44, 19,944.20 and 12,400.48

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Solution

The fourth proportional to 13,361.44, 19,944.20 and 12,400.48 is: 18,509.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,361.44 : 19,944.20 = 12,400.48 : x
  2. Step 2: Convert to fraction form
    13,361.44/19,944.20 = 12,400.48/x
  3. Step 3: Cross multiply
    13,361.44x = 19,944.20 × 12,400.48
  4. Step 4: Simplify right side
    13,361.44x = 247,317,653.22
  5. Step 5: Solve for x
    x = 247,317,653.22/13,361.44
  6. Step 6: Final answer
    x = 18,509.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.