Home / 20,765.29-28,658.84-11,811.06

Finding the Fourth Proportional to 20,765.29, 28,658.84 and 11,811.06

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Solution

The fourth proportional to 20,765.29, 28,658.84 and 11,811.06 is: 16,300.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,765.29 : 28,658.84 = 11,811.06 : x
  2. Step 2: Convert to fraction form
    20,765.29/28,658.84 = 11,811.06/x
  3. Step 3: Cross multiply
    20,765.29x = 28,658.84 × 11,811.06
  4. Step 4: Simplify right side
    20,765.29x = 338,491,219.72
  5. Step 5: Solve for x
    x = 338,491,219.72/20,765.29
  6. Step 6: Final answer
    x = 16,300.82

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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.