Home / 20,731.82-28,610.15-11,779.56

Finding the Fourth Proportional to 20,731.82, 28,610.15 and 11,779.56

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Solution

The fourth proportional to 20,731.82, 28,610.15 and 11,779.56 is: 16,255.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,731.82 : 28,610.15 = 11,779.56 : x
  2. Step 2: Convert to fraction form
    20,731.82/28,610.15 = 11,779.56/x
  3. Step 3: Cross multiply
    20,731.82x = 28,610.15 × 11,779.56
  4. Step 4: Simplify right side
    20,731.82x = 337,014,919.64
  5. Step 5: Solve for x
    x = 337,014,919.64/20,731.82
  6. Step 6: Final answer
    x = 16,255.93

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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.