Home / 12,385.98-18,578.97-3,621.78

Finding the Fourth Proportional to 12,385.98, 18,578.97 and 3,621.78

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Solution

The fourth proportional to 12,385.98, 18,578.97 and 3,621.78 is: 5,432.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,385.98 : 18,578.97 = 3,621.78 : x
  2. Step 2: Convert to fraction form
    12,385.98/18,578.97 = 3,621.78/x
  3. Step 3: Cross multiply
    12,385.98x = 18,578.97 × 3,621.78
  4. Step 4: Simplify right side
    12,385.98x = 67,288,941.97
  5. Step 5: Solve for x
    x = 67,288,941.97/12,385.98
  6. Step 6: Final answer
    x = 5,432.67

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Similar ratio
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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.