Home / 20,662.60-28,514.48-11,231.20

Finding the Fourth Proportional to 20,662.60, 28,514.48 and 11,231.20

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Solution

The fourth proportional to 20,662.60, 28,514.48 and 11,231.20 is: 15,499.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,662.60 : 28,514.48 = 11,231.20 : x
  2. Step 2: Convert to fraction form
    20,662.60/28,514.48 = 11,231.20/x
  3. Step 3: Cross multiply
    20,662.60x = 28,514.48 × 11,231.20
  4. Step 4: Simplify right side
    20,662.60x = 320,251,827.78
  5. Step 5: Solve for x
    x = 320,251,827.78/20,662.60
  6. Step 6: Final answer
    x = 15,499.11

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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.