Home / 20,512.35-30,768.53-12,725.55

Finding the Fourth Proportional to 20,512.35, 30,768.53 and 12,725.55

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Solution

The fourth proportional to 20,512.35, 30,768.53 and 12,725.55 is: 19,088.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,512.35 : 30,768.53 = 12,725.55 : x
  2. Step 2: Convert to fraction form
    20,512.35/30,768.53 = 12,725.55/x
  3. Step 3: Cross multiply
    20,512.35x = 30,768.53 × 12,725.55
  4. Step 4: Simplify right side
    20,512.35x = 391,546,403.31
  5. Step 5: Solve for x
    x = 391,546,403.31/20,512.35
  6. Step 6: Final answer
    x = 19,088.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.