Home / 20,219.75-30,334.67-7,740.75

Finding the Fourth Proportional to 20,219.75, 30,334.67 and 7,740.75

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Solution

The fourth proportional to 20,219.75, 30,334.67 and 7,740.75 is: 11,613.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,219.75 : 30,334.67 = 7,740.75 : x
  2. Step 2: Convert to fraction form
    20,219.75/30,334.67 = 7,740.75/x
  3. Step 3: Cross multiply
    20,219.75x = 30,334.67 × 7,740.75
  4. Step 4: Simplify right side
    20,219.75x = 234,813,096.80
  5. Step 5: Solve for x
    x = 234,813,096.80/20,219.75
  6. Step 6: Final answer
    x = 11,613.06

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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.