Home / 12,219.85-18,329.91-3,899.80

Finding the Fourth Proportional to 12,219.85, 18,329.91 and 3,899.80

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Solution

The fourth proportional to 12,219.85, 18,329.91 and 3,899.80 is: 5,849.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,219.85 : 18,329.91 = 3,899.80 : x
  2. Step 2: Convert to fraction form
    12,219.85/18,329.91 = 3,899.80/x
  3. Step 3: Cross multiply
    12,219.85x = 18,329.91 × 3,899.80
  4. Step 4: Simplify right side
    12,219.85x = 71,482,983.02
  5. Step 5: Solve for x
    x = 71,482,983.02/12,219.85
  6. Step 6: Final answer
    x = 5,849.74

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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.