Home / 18,771.57-28,137.92-15,449.76

Finding the Fourth Proportional to 18,771.57, 28,137.92 and 15,449.76

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Solution

The fourth proportional to 18,771.57, 28,137.92 and 15,449.76 is: 23,158.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,771.57 : 28,137.92 = 15,449.76 : x
  2. Step 2: Convert to fraction form
    18,771.57/28,137.92 = 15,449.76/x
  3. Step 3: Cross multiply
    18,771.57x = 28,137.92 × 15,449.76
  4. Step 4: Simplify right side
    18,771.57x = 434,724,033.65
  5. Step 5: Solve for x
    x = 434,724,033.65/18,771.57
  6. Step 6: Final answer
    x = 23,158.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.