Home / 3,121.38-4,308.23-1,795.84

Finding the Fourth Proportional to 3,121.38, 4,308.23 and 1,795.84

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Solution

The fourth proportional to 3,121.38, 4,308.23 and 1,795.84 is: 2,478.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.38 : 4,308.23 = 1,795.84 : x
  2. Step 2: Convert to fraction form
    3,121.38/4,308.23 = 1,795.84/x
  3. Step 3: Cross multiply
    3,121.38x = 4,308.23 × 1,795.84
  4. Step 4: Simplify right side
    3,121.38x = 7,736,885.48
  5. Step 5: Solve for x
    x = 7,736,885.48/3,121.38
  6. Step 6: Final answer
    x = 2,478.67

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.