Home / 28,738.71-39,646.39-20,768.31

Finding the Fourth Proportional to 28,738.71, 39,646.39 and 20,768.31

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Solution

The fourth proportional to 28,738.71, 39,646.39 and 20,768.31 is: 28,650.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,738.71 : 39,646.39 = 20,768.31 : x
  2. Step 2: Convert to fraction form
    28,738.71/39,646.39 = 20,768.31/x
  3. Step 3: Cross multiply
    28,738.71x = 39,646.39 × 20,768.31
  4. Step 4: Simplify right side
    28,738.71x = 823,388,517.90
  5. Step 5: Solve for x
    x = 823,388,517.90/28,738.71
  6. Step 6: Final answer
    x = 28,650.85

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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.