Home / 18,919.80-28,383.14-6,439.23

Finding the Fourth Proportional to 18,919.80, 28,383.14 and 6,439.23

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Solution

The fourth proportional to 18,919.80, 28,383.14 and 6,439.23 is: 9,660.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,919.80 : 28,383.14 = 6,439.23 : x
  2. Step 2: Convert to fraction form
    18,919.80/28,383.14 = 6,439.23/x
  3. Step 3: Cross multiply
    18,919.80x = 28,383.14 × 6,439.23
  4. Step 4: Simplify right side
    18,919.80x = 182,765,582.68
  5. Step 5: Solve for x
    x = 182,765,582.68/18,919.80
  6. Step 6: Final answer
    x = 9,660.02

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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.