Home / 28,438.70-39,245.39-15,863.45

Finding the Fourth Proportional to 28,438.70, 39,245.39 and 15,863.45

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Solution

The fourth proportional to 28,438.70, 39,245.39 and 15,863.45 is: 21,891.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,438.70 : 39,245.39 = 15,863.45 : x
  2. Step 2: Convert to fraction form
    28,438.70/39,245.39 = 15,863.45/x
  3. Step 3: Cross multiply
    28,438.70x = 39,245.39 × 15,863.45
  4. Step 4: Simplify right side
    28,438.70x = 622,567,006.45
  5. Step 5: Solve for x
    x = 622,567,006.45/28,438.70
  6. Step 6: Final answer
    x = 21,891.55

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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.