Home / 28,361.36-39,141-15,790.16

Finding the Fourth Proportional to 28,361.36, 39,141 and 15,790.16

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Solution

The fourth proportional to 28,361.36, 39,141 and 15,790.16 is: 21,791.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,361.36 : 39,141 = 15,790.16 : x
  2. Step 2: Convert to fraction form
    28,361.36/39,141 = 15,790.16/x
  3. Step 3: Cross multiply
    28,361.36x = 39,141 × 15,790.16
  4. Step 4: Simplify right side
    28,361.36x = 618,042,652.56
  5. Step 5: Solve for x
    x = 618,042,652.56/28,361.36
  6. Step 6: Final answer
    x = 21,791.71

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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.