Home / 28,638.08-39,520.43-15,893.21

Finding the Fourth Proportional to 28,638.08, 39,520.43 and 15,893.21

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Solution

The fourth proportional to 28,638.08, 39,520.43 and 15,893.21 is: 21,932.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,638.08 : 39,520.43 = 15,893.21 : x
  2. Step 2: Convert to fraction form
    28,638.08/39,520.43 = 15,893.21/x
  3. Step 3: Cross multiply
    28,638.08x = 39,520.43 × 15,893.21
  4. Step 4: Simplify right side
    28,638.08x = 628,106,295.68
  5. Step 5: Solve for x
    x = 628,106,295.68/28,638.08
  6. Step 6: Final answer
    x = 21,932.56

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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.