Home / 20,512.50-30,771.72-6,467.78

Finding the Fourth Proportional to 20,512.50, 30,771.72 and 6,467.78

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Solution

The fourth proportional to 20,512.50, 30,771.72 and 6,467.78 is: 9,702.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,512.50 : 30,771.72 = 6,467.78 : x
  2. Step 2: Convert to fraction form
    20,512.50/30,771.72 = 6,467.78/x
  3. Step 3: Cross multiply
    20,512.50x = 30,771.72 × 6,467.78
  4. Step 4: Simplify right side
    20,512.50x = 199,024,715.18
  5. Step 5: Solve for x
    x = 199,024,715.18/20,512.50
  6. Step 6: Final answer
    x = 9,702.61

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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.