Home / 20,609.54-28,441.17-11,178.09

Finding the Fourth Proportional to 20,609.54, 28,441.17 and 11,178.09

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Solution

The fourth proportional to 20,609.54, 28,441.17 and 11,178.09 is: 15,425.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,609.54 : 28,441.17 = 11,178.09 : x
  2. Step 2: Convert to fraction form
    20,609.54/28,441.17 = 11,178.09/x
  3. Step 3: Cross multiply
    20,609.54x = 28,441.17 × 11,178.09
  4. Step 4: Simplify right side
    20,609.54x = 317,917,957.97
  5. Step 5: Solve for x
    x = 317,917,957.97/20,609.54
  6. Step 6: Final answer
    x = 15,425.77

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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.