Home / 3,912.15-5,398.69-2,419.67

Finding the Fourth Proportional to 3,912.15, 5,398.69 and 2,419.67

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Solution

The fourth proportional to 3,912.15, 5,398.69 and 2,419.67 is: 3,339.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,912.15 : 5,398.69 = 2,419.67 : x
  2. Step 2: Convert to fraction form
    3,912.15/5,398.69 = 2,419.67/x
  3. Step 3: Cross multiply
    3,912.15x = 5,398.69 × 2,419.67
  4. Step 4: Simplify right side
    3,912.15x = 13,063,060.22
  5. Step 5: Solve for x
    x = 13,063,060.22/3,912.15
  6. Step 6: Final answer
    x = 3,339.10

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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.