Home / 20,211.20-30,322.28-7,724.65

Finding the Fourth Proportional to 20,211.20, 30,322.28 and 7,724.65

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Solution

The fourth proportional to 20,211.20, 30,322.28 and 7,724.65 is: 11,589.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,211.20 : 30,322.28 = 7,724.65 : x
  2. Step 2: Convert to fraction form
    20,211.20/30,322.28 = 7,724.65/x
  3. Step 3: Cross multiply
    20,211.20x = 30,322.28 × 7,724.65
  4. Step 4: Simplify right side
    20,211.20x = 234,229,000.20
  5. Step 5: Solve for x
    x = 234,229,000.20/20,211.20
  6. Step 6: Final answer
    x = 11,589.07

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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.