Home / 20,731.34-28,610.52-11,778.86

Finding the Fourth Proportional to 20,731.34, 28,610.52 and 11,778.86

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Solution

The fourth proportional to 20,731.34, 28,610.52 and 11,778.86 is: 16,255.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,731.34 : 28,610.52 = 11,778.86 : x
  2. Step 2: Convert to fraction form
    20,731.34/28,610.52 = 11,778.86/x
  3. Step 3: Cross multiply
    20,731.34x = 28,610.52 × 11,778.86
  4. Step 4: Simplify right side
    20,731.34x = 336,999,309.61
  5. Step 5: Solve for x
    x = 336,999,309.61/20,731.34
  6. Step 6: Final answer
    x = 16,255.55

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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.