Home / 20,388.48-30,543.20-11,934.56

Finding the Fourth Proportional to 20,388.48, 30,543.20 and 11,934.56

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Solution

The fourth proportional to 20,388.48, 30,543.20 and 11,934.56 is: 17,878.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,388.48 : 30,543.20 = 11,934.56 : x
  2. Step 2: Convert to fraction form
    20,388.48/30,543.20 = 11,934.56/x
  3. Step 3: Cross multiply
    20,388.48x = 30,543.20 × 11,934.56
  4. Step 4: Simplify right side
    20,388.48x = 364,519,652.99
  5. Step 5: Solve for x
    x = 364,519,652.99/20,388.48
  6. Step 6: Final answer
    x = 17,878.71

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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.