Home / 20,005.12-27,609.20-11,507.61

Finding the Fourth Proportional to 20,005.12, 27,609.20 and 11,507.61

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Solution

The fourth proportional to 20,005.12, 27,609.20 and 11,507.61 is: 15,881.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,005.12 : 27,609.20 = 11,507.61 : x
  2. Step 2: Convert to fraction form
    20,005.12/27,609.20 = 11,507.61/x
  3. Step 3: Cross multiply
    20,005.12x = 27,609.20 × 11,507.61
  4. Step 4: Simplify right side
    20,005.12x = 317,715,906.01
  5. Step 5: Solve for x
    x = 317,715,906.01/20,005.12
  6. Step 6: Final answer
    x = 15,881.73

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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.