Home / 7,424.20-11,121.90-4,131.40

Finding the Fourth Proportional to 7,424.20, 11,121.90 and 4,131.40

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Solution

The fourth proportional to 7,424.20, 11,121.90 and 4,131.40 is: 6,189.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,424.20 : 11,121.90 = 4,131.40 : x
  2. Step 2: Convert to fraction form
    7,424.20/11,121.90 = 4,131.40/x
  3. Step 3: Cross multiply
    7,424.20x = 11,121.90 × 4,131.40
  4. Step 4: Simplify right side
    7,424.20x = 45,949,017.66
  5. Step 5: Solve for x
    x = 45,949,017.66/7,424.20
  6. Step 6: Final answer
    x = 6,189.09

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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.