Home / 20,729.22-28,605.29-11,775.54

Finding the Fourth Proportional to 20,729.22, 28,605.29 and 11,775.54

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Solution

The fourth proportional to 20,729.22, 28,605.29 and 11,775.54 is: 16,249.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,729.22 : 28,605.29 = 11,775.54 : x
  2. Step 2: Convert to fraction form
    20,729.22/28,605.29 = 11,775.54/x
  3. Step 3: Cross multiply
    20,729.22x = 28,605.29 × 11,775.54
  4. Step 4: Simplify right side
    20,729.22x = 336,842,736.61
  5. Step 5: Solve for x
    x = 336,842,736.61/20,729.22
  6. Step 6: Final answer
    x = 16,249.66

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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.