Home / 28,469.94-39,288.81-15,723.09

Finding the Fourth Proportional to 28,469.94, 39,288.81 and 15,723.09

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Solution

The fourth proportional to 28,469.94, 39,288.81 and 15,723.09 is: 21,698.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,469.94 : 39,288.81 = 15,723.09 : x
  2. Step 2: Convert to fraction form
    28,469.94/39,288.81 = 15,723.09/x
  3. Step 3: Cross multiply
    28,469.94x = 39,288.81 × 15,723.09
  4. Step 4: Simplify right side
    28,469.94x = 617,741,495.62
  5. Step 5: Solve for x
    x = 617,741,495.62/28,469.94
  6. Step 6: Final answer
    x = 21,698.03

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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.