Home / 20,757.30-28,644.93-11,325.66

Finding the Fourth Proportional to 20,757.30, 28,644.93 and 11,325.66

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Solution

The fourth proportional to 20,757.30, 28,644.93 and 11,325.66 is: 15,629.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,757.30 : 28,644.93 = 11,325.66 : x
  2. Step 2: Convert to fraction form
    20,757.30/28,644.93 = 11,325.66/x
  3. Step 3: Cross multiply
    20,757.30x = 28,644.93 × 11,325.66
  4. Step 4: Simplify right side
    20,757.30x = 324,422,737.90
  5. Step 5: Solve for x
    x = 324,422,737.90/20,757.30
  6. Step 6: Final answer
    x = 15,629.33

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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.