Home / 13,578.91-20,370.22-4,220.37

Finding the Fourth Proportional to 13,578.91, 20,370.22 and 4,220.37

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Solution

The fourth proportional to 13,578.91, 20,370.22 and 4,220.37 is: 6,331.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,578.91 : 20,370.22 = 4,220.37 : x
  2. Step 2: Convert to fraction form
    13,578.91/20,370.22 = 4,220.37/x
  3. Step 3: Cross multiply
    13,578.91x = 20,370.22 × 4,220.37
  4. Step 4: Simplify right side
    13,578.91x = 85,969,854.83
  5. Step 5: Solve for x
    x = 85,969,854.83/13,578.91
  6. Step 6: Final answer
    x = 6,331.13

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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.