Home / 20,511.32-30,770.26-7,188.04

Finding the Fourth Proportional to 20,511.32, 30,770.26 and 7,188.04

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Solution

The fourth proportional to 20,511.32, 30,770.26 and 7,188.04 is: 10,783.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,511.32 : 30,770.26 = 7,188.04 : x
  2. Step 2: Convert to fraction form
    20,511.32/30,770.26 = 7,188.04/x
  3. Step 3: Cross multiply
    20,511.32x = 30,770.26 × 7,188.04
  4. Step 4: Simplify right side
    20,511.32x = 221,177,859.69
  5. Step 5: Solve for x
    x = 221,177,859.69/20,511.32
  6. Step 6: Final answer
    x = 10,783.21

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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.