Home / 13,721.78-20,584.64-4,234.91

Finding the Fourth Proportional to 13,721.78, 20,584.64 and 4,234.91

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Solution

The fourth proportional to 13,721.78, 20,584.64 and 4,234.91 is: 6,352.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,721.78 : 20,584.64 = 4,234.91 : x
  2. Step 2: Convert to fraction form
    13,721.78/20,584.64 = 4,234.91/x
  3. Step 3: Cross multiply
    13,721.78x = 20,584.64 × 4,234.91
  4. Step 4: Simplify right side
    13,721.78x = 87,173,973.68
  5. Step 5: Solve for x
    x = 87,173,973.68/13,721.78
  6. Step 6: Final answer
    x = 6,352.97

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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.