Home / 28,438.88-39,245.67-15,863.63

Finding the Fourth Proportional to 28,438.88, 39,245.67 and 15,863.63

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Solution

The fourth proportional to 28,438.88, 39,245.67 and 15,863.63 is: 21,891.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,438.88 : 39,245.67 = 15,863.63 : x
  2. Step 2: Convert to fraction form
    28,438.88/39,245.67 = 15,863.63/x
  3. Step 3: Cross multiply
    28,438.88x = 39,245.67 × 15,863.63
  4. Step 4: Simplify right side
    28,438.88x = 622,578,591.75
  5. Step 5: Solve for x
    x = 622,578,591.75/28,438.88
  6. Step 6: Final answer
    x = 21,891.82

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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.