Home / 4,120.30-6,180.90-3,990.70

Finding the Fourth Proportional to 4,120.30, 6,180.90 and 3,990.70

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Solution

The fourth proportional to 4,120.30, 6,180.90 and 3,990.70 is: 5,986.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,120.30 : 6,180.90 = 3,990.70 : x
  2. Step 2: Convert to fraction form
    4,120.30/6,180.90 = 3,990.70/x
  3. Step 3: Cross multiply
    4,120.30x = 6,180.90 × 3,990.70
  4. Step 4: Simplify right side
    4,120.30x = 24,666,117.63
  5. Step 5: Solve for x
    x = 24,666,117.63/4,120.30
  6. Step 6: Final answer
    x = 5,986.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.