Home / 28,245.97-38,979.46-15,670.72

Finding the Fourth Proportional to 28,245.97, 38,979.46 and 15,670.72

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Solution

The fourth proportional to 28,245.97, 38,979.46 and 15,670.72 is: 21,625.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,245.97 : 38,979.46 = 15,670.72 : x
  2. Step 2: Convert to fraction form
    28,245.97/38,979.46 = 15,670.72/x
  3. Step 3: Cross multiply
    28,245.97x = 38,979.46 × 15,670.72
  4. Step 4: Simplify right side
    28,245.97x = 610,836,203.41
  5. Step 5: Solve for x
    x = 610,836,203.41/28,245.97
  6. Step 6: Final answer
    x = 21,625.61

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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.