Home / 20,662.79-28,514.82-11,231.34

Finding the Fourth Proportional to 20,662.79, 28,514.82 and 11,231.34

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Solution

The fourth proportional to 20,662.79, 28,514.82 and 11,231.34 is: 15,499.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,662.79 : 28,514.82 = 11,231.34 : x
  2. Step 2: Convert to fraction form
    20,662.79/28,514.82 = 11,231.34/x
  3. Step 3: Cross multiply
    20,662.79x = 28,514.82 × 11,231.34
  4. Step 4: Simplify right side
    20,662.79x = 320,259,638.46
  5. Step 5: Solve for x
    x = 320,259,638.46/20,662.79
  6. Step 6: Final answer
    x = 15,499.35

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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.