Home / 20,191.86-27,845.44-15,403.30

Finding the Fourth Proportional to 20,191.86, 27,845.44 and 15,403.30

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Solution

The fourth proportional to 20,191.86, 27,845.44 and 15,403.30 is: 21,241.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,191.86 : 27,845.44 = 15,403.30 : x
  2. Step 2: Convert to fraction form
    20,191.86/27,845.44 = 15,403.30/x
  3. Step 3: Cross multiply
    20,191.86x = 27,845.44 × 15,403.30
  4. Step 4: Simplify right side
    20,191.86x = 428,911,665.95
  5. Step 5: Solve for x
    x = 428,911,665.95/20,191.86
  6. Step 6: Final answer
    x = 21,241.81

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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.