Home / 20,757.09-28,644.39-11,325.72

Finding the Fourth Proportional to 20,757.09, 28,644.39 and 11,325.72

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Solution

The fourth proportional to 20,757.09, 28,644.39 and 11,325.72 is: 15,629.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,757.09 : 28,644.39 = 11,325.72 : x
  2. Step 2: Convert to fraction form
    20,757.09/28,644.39 = 11,325.72/x
  3. Step 3: Cross multiply
    20,757.09x = 28,644.39 × 11,325.72
  4. Step 4: Simplify right side
    20,757.09x = 324,418,340.71
  5. Step 5: Solve for x
    x = 324,418,340.71/20,757.09
  6. Step 6: Final answer
    x = 15,629.28

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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.