Home / 20,765.41-28,655.35-11,811.85

Finding the Fourth Proportional to 20,765.41, 28,655.35 and 11,811.85

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Solution

The fourth proportional to 20,765.41, 28,655.35 and 11,811.85 is: 16,299.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,765.41 : 28,655.35 = 11,811.85 : x
  2. Step 2: Convert to fraction form
    20,765.41/28,655.35 = 11,811.85/x
  3. Step 3: Cross multiply
    20,765.41x = 28,655.35 × 11,811.85
  4. Step 4: Simplify right side
    20,765.41x = 338,472,695.90
  5. Step 5: Solve for x
    x = 338,472,695.90/20,765.41
  6. Step 6: Final answer
    x = 16,299.83

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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.