Home / 10,140.75-15,211.82-3,120.33

Finding the Fourth Proportional to 10,140.75, 15,211.82 and 3,120.33

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Solution

The fourth proportional to 10,140.75, 15,211.82 and 3,120.33 is: 4,680.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,140.75 : 15,211.82 = 3,120.33 : x
  2. Step 2: Convert to fraction form
    10,140.75/15,211.82 = 3,120.33/x
  3. Step 3: Cross multiply
    10,140.75x = 15,211.82 × 3,120.33
  4. Step 4: Simplify right side
    10,140.75x = 47,465,882.70
  5. Step 5: Solve for x
    x = 47,465,882.70/10,140.75
  6. Step 6: Final answer
    x = 4,680.71

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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.