Home / 20,241.20-30,355.20-7,760.56

Finding the Fourth Proportional to 20,241.20, 30,355.20 and 7,760.56

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Solution

The fourth proportional to 20,241.20, 30,355.20 and 7,760.56 is: 11,638.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,241.20 : 30,355.20 = 7,760.56 : x
  2. Step 2: Convert to fraction form
    20,241.20/30,355.20 = 7,760.56/x
  3. Step 3: Cross multiply
    20,241.20x = 30,355.20 × 7,760.56
  4. Step 4: Simplify right side
    20,241.20x = 235,573,350.91
  5. Step 5: Solve for x
    x = 235,573,350.91/20,241.20
  6. Step 6: Final answer
    x = 11,638.31

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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.