Home / 20,635.92-28,477.62-12,678.03

Finding the Fourth Proportional to 20,635.92, 28,477.62 and 12,678.03

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Solution

The fourth proportional to 20,635.92, 28,477.62 and 12,678.03 is: 17,495.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,635.92 : 28,477.62 = 12,678.03 : x
  2. Step 2: Convert to fraction form
    20,635.92/28,477.62 = 12,678.03/x
  3. Step 3: Cross multiply
    20,635.92x = 28,477.62 × 12,678.03
  4. Step 4: Simplify right side
    20,635.92x = 361,040,120.69
  5. Step 5: Solve for x
    x = 361,040,120.69/20,635.92
  6. Step 6: Final answer
    x = 17,495.71

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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.