Home / 3,990.20-5,998.26-3,970.76

Finding the Fourth Proportional to 3,990.20, 5,998.26 and 3,970.76

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Solution

The fourth proportional to 3,990.20, 5,998.26 and 3,970.76 is: 5,969.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.20 : 5,998.26 = 3,970.76 : x
  2. Step 2: Convert to fraction form
    3,990.20/5,998.26 = 3,970.76/x
  3. Step 3: Cross multiply
    3,990.20x = 5,998.26 × 3,970.76
  4. Step 4: Simplify right side
    3,990.20x = 23,817,650.88
  5. Step 5: Solve for x
    x = 23,817,650.88/3,990.20
  6. Step 6: Final answer
    x = 5,969.04

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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.