Home / 20,904.62-28,853.91-12,942.32

Finding the Fourth Proportional to 20,904.62, 28,853.91 and 12,942.32

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Solution

The fourth proportional to 20,904.62, 28,853.91 and 12,942.32 is: 17,863.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,904.62 : 28,853.91 = 12,942.32 : x
  2. Step 2: Convert to fraction form
    20,904.62/28,853.91 = 12,942.32/x
  3. Step 3: Cross multiply
    20,904.62x = 28,853.91 × 12,942.32
  4. Step 4: Simplify right side
    20,904.62x = 373,436,608.61
  5. Step 5: Solve for x
    x = 373,436,608.61/20,904.62
  6. Step 6: Final answer
    x = 17,863.83

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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.