Home / 20,760.96-28,650-11,329.44

Finding the Fourth Proportional to 20,760.96, 28,650 and 11,329.44

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Solution

The fourth proportional to 20,760.96, 28,650 and 11,329.44 is: 15,634.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,760.96 : 28,650 = 11,329.44 : x
  2. Step 2: Convert to fraction form
    20,760.96/28,650 = 11,329.44/x
  3. Step 3: Cross multiply
    20,760.96x = 28,650 × 11,329.44
  4. Step 4: Simplify right side
    20,760.96x = 324,588,456
  5. Step 5: Solve for x
    x = 324,588,456/20,760.96
  6. Step 6: Final answer
    x = 15,634.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.