Home / 20,644.30-28,493.68-13,571.38

Finding the Fourth Proportional to 20,644.30, 28,493.68 and 13,571.38

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Solution

The fourth proportional to 20,644.30, 28,493.68 and 13,571.38 is: 18,731.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,644.30 : 28,493.68 = 13,571.38 : x
  2. Step 2: Convert to fraction form
    20,644.30/28,493.68 = 13,571.38/x
  3. Step 3: Cross multiply
    20,644.30x = 28,493.68 × 13,571.38
  4. Step 4: Simplify right side
    20,644.30x = 386,698,558.88
  5. Step 5: Solve for x
    x = 386,698,558.88/20,644.30
  6. Step 6: Final answer
    x = 18,731.49

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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.