Home / 20,731.15-28,609.71-11,778.37

Finding the Fourth Proportional to 20,731.15, 28,609.71 and 11,778.37

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Solution

The fourth proportional to 20,731.15, 28,609.71 and 11,778.37 is: 16,254.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,731.15 : 28,609.71 = 11,778.37 : x
  2. Step 2: Convert to fraction form
    20,731.15/28,609.71 = 11,778.37/x
  3. Step 3: Cross multiply
    20,731.15x = 28,609.71 × 11,778.37
  4. Step 4: Simplify right side
    20,731.15x = 336,975,749.97
  5. Step 5: Solve for x
    x = 336,975,749.97/20,731.15
  6. Step 6: Final answer
    x = 16,254.56

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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.