Home / 18,979.92-28,469.61-4,939.92

Finding the Fourth Proportional to 18,979.92, 28,469.61 and 4,939.92

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Solution

The fourth proportional to 18,979.92, 28,469.61 and 4,939.92 is: 7,409.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,979.92 : 28,469.61 = 4,939.92 : x
  2. Step 2: Convert to fraction form
    18,979.92/28,469.61 = 4,939.92/x
  3. Step 3: Cross multiply
    18,979.92x = 28,469.61 × 4,939.92
  4. Step 4: Simplify right side
    18,979.92x = 140,637,595.83
  5. Step 5: Solve for x
    x = 140,637,595.83/18,979.92
  6. Step 6: Final answer
    x = 7,409.81

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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.