Home / 20,425.75-30,638.64-6,385.84

Finding the Fourth Proportional to 20,425.75, 30,638.64 and 6,385.84

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Solution

The fourth proportional to 20,425.75, 30,638.64 and 6,385.84 is: 9,578.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,425.75 : 30,638.64 = 6,385.84 : x
  2. Step 2: Convert to fraction form
    20,425.75/30,638.64 = 6,385.84/x
  3. Step 3: Cross multiply
    20,425.75x = 30,638.64 × 6,385.84
  4. Step 4: Simplify right side
    20,425.75x = 195,653,452.86
  5. Step 5: Solve for x
    x = 195,653,452.86/20,425.75
  6. Step 6: Final answer
    x = 9,578.76

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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.