Home / 18,986.92-28,480.38-12,105.16

Finding the Fourth Proportional to 18,986.92, 28,480.38 and 12,105.16

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Solution

The fourth proportional to 18,986.92, 28,480.38 and 12,105.16 is: 18,157.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,986.92 : 28,480.38 = 12,105.16 : x
  2. Step 2: Convert to fraction form
    18,986.92/28,480.38 = 12,105.16/x
  3. Step 3: Cross multiply
    18,986.92x = 28,480.38 × 12,105.16
  4. Step 4: Simplify right side
    18,986.92x = 344,759,556.76
  5. Step 5: Solve for x
    x = 344,759,556.76/18,986.92
  6. Step 6: Final answer
    x = 18,157.74

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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.