Home / 20,666.97-28,520.62-11,235.73

Finding the Fourth Proportional to 20,666.97, 28,520.62 and 11,235.73

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Solution

The fourth proportional to 20,666.97, 28,520.62 and 11,235.73 is: 15,505.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,666.97 : 28,520.62 = 11,235.73 : x
  2. Step 2: Convert to fraction form
    20,666.97/28,520.62 = 11,235.73/x
  3. Step 3: Cross multiply
    20,666.97x = 28,520.62 × 11,235.73
  4. Step 4: Simplify right side
    20,666.97x = 320,449,985.75
  5. Step 5: Solve for x
    x = 320,449,985.75/20,666.97
  6. Step 6: Final answer
    x = 15,505.42

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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.