Home / 28,361.88-39,137.04-15,787.44

Finding the Fourth Proportional to 28,361.88, 39,137.04 and 15,787.44

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Solution

The fourth proportional to 28,361.88, 39,137.04 and 15,787.44 is: 21,785.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,361.88 : 39,137.04 = 15,787.44 : x
  2. Step 2: Convert to fraction form
    28,361.88/39,137.04 = 15,787.44/x
  3. Step 3: Cross multiply
    28,361.88x = 39,137.04 × 15,787.44
  4. Step 4: Simplify right side
    28,361.88x = 617,873,670.78
  5. Step 5: Solve for x
    x = 617,873,670.78/28,361.88
  6. Step 6: Final answer
    x = 21,785.36

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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.