Home / 3,939.04-5,435.79-2,170.67

Finding the Fourth Proportional to 3,939.04, 5,435.79 and 2,170.67

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Solution

The fourth proportional to 3,939.04, 5,435.79 and 2,170.67 is: 2,995.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.04 : 5,435.79 = 2,170.67 : x
  2. Step 2: Convert to fraction form
    3,939.04/5,435.79 = 2,170.67/x
  3. Step 3: Cross multiply
    3,939.04x = 5,435.79 × 2,170.67
  4. Step 4: Simplify right side
    3,939.04x = 11,799,306.28
  5. Step 5: Solve for x
    x = 11,799,306.28/3,939.04
  6. Step 6: Final answer
    x = 2,995.48

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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.