Home / 3,887.85-5,330.21-3,817.90

Finding the Fourth Proportional to 3,887.85, 5,330.21 and 3,817.90

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Solution

The fourth proportional to 3,887.85, 5,330.21 and 3,817.90 is: 5,234.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,887.85 : 5,330.21 = 3,817.90 : x
  2. Step 2: Convert to fraction form
    3,887.85/5,330.21 = 3,817.90/x
  3. Step 3: Cross multiply
    3,887.85x = 5,330.21 × 3,817.90
  4. Step 4: Simplify right side
    3,887.85x = 20,350,208.76
  5. Step 5: Solve for x
    x = 20,350,208.76/3,887.85
  6. Step 6: Final answer
    x = 5,234.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.