Home / 7,185.38-10,778.58-1,920.38

Finding the Fourth Proportional to 7,185.38, 10,778.58 and 1,920.38

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Solution

The fourth proportional to 7,185.38, 10,778.58 and 1,920.38 is: 2,880.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,185.38 : 10,778.58 = 1,920.38 : x
  2. Step 2: Convert to fraction form
    7,185.38/10,778.58 = 1,920.38/x
  3. Step 3: Cross multiply
    7,185.38x = 10,778.58 × 1,920.38
  4. Step 4: Simplify right side
    7,185.38x = 20,698,996.41
  5. Step 5: Solve for x
    x = 20,698,996.41/7,185.38
  6. Step 6: Final answer
    x = 2,880.71

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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.