Home / 13,578.91-20,371.55-4,218.44

Finding the Fourth Proportional to 13,578.91, 20,371.55 and 4,218.44

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Solution

The fourth proportional to 13,578.91, 20,371.55 and 4,218.44 is: 6,328.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,578.91 : 20,371.55 = 4,218.44 : x
  2. Step 2: Convert to fraction form
    13,578.91/20,371.55 = 4,218.44/x
  3. Step 3: Cross multiply
    13,578.91x = 20,371.55 × 4,218.44
  4. Step 4: Simplify right side
    13,578.91x = 85,936,161.38
  5. Step 5: Solve for x
    x = 85,936,161.38/13,578.91
  6. Step 6: Final answer
    x = 6,328.65

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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.