Home / 7,489.21-11,230.18-3,980.90

Finding the Fourth Proportional to 7,489.21, 11,230.18 and 3,980.90

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Solution

The fourth proportional to 7,489.21, 11,230.18 and 3,980.90 is: 5,969.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,489.21 : 11,230.18 = 3,980.90 : x
  2. Step 2: Convert to fraction form
    7,489.21/11,230.18 = 3,980.90/x
  3. Step 3: Cross multiply
    7,489.21x = 11,230.18 × 3,980.90
  4. Step 4: Simplify right side
    7,489.21x = 44,706,223.56
  5. Step 5: Solve for x
    x = 44,706,223.56/7,489.21
  6. Step 6: Final answer
    x = 5,969.42

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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.