Home / 3,840.39-5,299.07-2,161.67

Finding the Fourth Proportional to 3,840.39, 5,299.07 and 2,161.67

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Solution

The fourth proportional to 3,840.39, 5,299.07 and 2,161.67 is: 2,982.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,840.39 : 5,299.07 = 2,161.67 : x
  2. Step 2: Convert to fraction form
    3,840.39/5,299.07 = 2,161.67/x
  3. Step 3: Cross multiply
    3,840.39x = 5,299.07 × 2,161.67
  4. Step 4: Simplify right side
    3,840.39x = 11,454,803.34
  5. Step 5: Solve for x
    x = 11,454,803.34/3,840.39
  6. Step 6: Final answer
    x = 2,982.72

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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.