Home / 20,662.88-28,514.97-11,231.47

Finding the Fourth Proportional to 20,662.88, 28,514.97 and 11,231.47

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Solution

The fourth proportional to 20,662.88, 28,514.97 and 11,231.47 is: 15,499.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,662.88 : 28,514.97 = 11,231.47 : x
  2. Step 2: Convert to fraction form
    20,662.88/28,514.97 = 11,231.47/x
  3. Step 3: Cross multiply
    20,662.88x = 28,514.97 × 11,231.47
  4. Step 4: Simplify right side
    20,662.88x = 320,265,030.11
  5. Step 5: Solve for x
    x = 320,265,030.11/20,662.88
  6. Step 6: Final answer
    x = 15,499.53

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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.