Home / 12,239.10-18,358.65-3,919.19

Finding the Fourth Proportional to 12,239.10, 18,358.65 and 3,919.19

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Solution

The fourth proportional to 12,239.10, 18,358.65 and 3,919.19 is: 5,878.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,239.10 : 18,358.65 = 3,919.19 : x
  2. Step 2: Convert to fraction form
    12,239.10/18,358.65 = 3,919.19/x
  3. Step 3: Cross multiply
    12,239.10x = 18,358.65 × 3,919.19
  4. Step 4: Simplify right side
    12,239.10x = 71,950,945.70
  5. Step 5: Solve for x
    x = 71,950,945.70/12,239.10
  6. Step 6: Final answer
    x = 5,878.78

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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.