Home / 18,667.47-28,000.30-6,979.78

Finding the Fourth Proportional to 18,667.47, 28,000.30 and 6,979.78

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Solution

The fourth proportional to 18,667.47, 28,000.30 and 6,979.78 is: 10,469.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,667.47 : 28,000.30 = 6,979.78 : x
  2. Step 2: Convert to fraction form
    18,667.47/28,000.30 = 6,979.78/x
  3. Step 3: Cross multiply
    18,667.47x = 28,000.30 × 6,979.78
  4. Step 4: Simplify right side
    18,667.47x = 195,435,964.57
  5. Step 5: Solve for x
    x = 195,435,964.57/18,667.47
  6. Step 6: Final answer
    x = 10,469.33

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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.