Home / 20,239.45-30,361.38-7,770.07

Finding the Fourth Proportional to 20,239.45, 30,361.38 and 7,770.07

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Solution

The fourth proportional to 20,239.45, 30,361.38 and 7,770.07 is: 11,655.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,239.45 : 30,361.38 = 7,770.07 : x
  2. Step 2: Convert to fraction form
    20,239.45/30,361.38 = 7,770.07/x
  3. Step 3: Cross multiply
    20,239.45x = 30,361.38 × 7,770.07
  4. Step 4: Simplify right side
    20,239.45x = 235,910,047.90
  5. Step 5: Solve for x
    x = 235,910,047.90/20,239.45
  6. Step 6: Final answer
    x = 11,655.95

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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.