Home / 28,115.22-38,801.46-15,542.40

Finding the Fourth Proportional to 28,115.22, 38,801.46 and 15,542.40

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Solution

The fourth proportional to 28,115.22, 38,801.46 and 15,542.40 is: 21,449.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,115.22 : 38,801.46 = 15,542.40 : x
  2. Step 2: Convert to fraction form
    28,115.22/38,801.46 = 15,542.40/x
  3. Step 3: Cross multiply
    28,115.22x = 38,801.46 × 15,542.40
  4. Step 4: Simplify right side
    28,115.22x = 603,067,811.90
  5. Step 5: Solve for x
    x = 603,067,811.90/28,115.22
  6. Step 6: Final answer
    x = 21,449.87

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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.