Home / 3,855.70-5,320.20-2,176.90

Finding the Fourth Proportional to 3,855.70, 5,320.20 and 2,176.90

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Solution

The fourth proportional to 3,855.70, 5,320.20 and 2,176.90 is: 3,003.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,855.70 : 5,320.20 = 2,176.90 : x
  2. Step 2: Convert to fraction form
    3,855.70/5,320.20 = 2,176.90/x
  3. Step 3: Cross multiply
    3,855.70x = 5,320.20 × 2,176.90
  4. Step 4: Simplify right side
    3,855.70x = 11,581,543.38
  5. Step 5: Solve for x
    x = 11,581,543.38/3,855.70
  6. Step 6: Final answer
    x = 3,003.75

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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.