Home / 12,209.83-18,314.89-3,889.80

Finding the Fourth Proportional to 12,209.83, 18,314.89 and 3,889.80

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Solution

The fourth proportional to 12,209.83, 18,314.89 and 3,889.80 is: 5,834.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,209.83 : 18,314.89 = 3,889.80 : x
  2. Step 2: Convert to fraction form
    12,209.83/18,314.89 = 3,889.80/x
  3. Step 3: Cross multiply
    12,209.83x = 18,314.89 × 3,889.80
  4. Step 4: Simplify right side
    12,209.83x = 71,241,249.40
  5. Step 5: Solve for x
    x = 71,241,249.40/12,209.83
  6. Step 6: Final answer
    x = 5,834.75

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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.