Home / 13,440.38-20,161.48-3,579.74

Finding the Fourth Proportional to 13,440.38, 20,161.48 and 3,579.74

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Solution

The fourth proportional to 13,440.38, 20,161.48 and 3,579.74 is: 5,369.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,440.38 : 20,161.48 = 3,579.74 : x
  2. Step 2: Convert to fraction form
    13,440.38/20,161.48 = 3,579.74/x
  3. Step 3: Cross multiply
    13,440.38x = 20,161.48 × 3,579.74
  4. Step 4: Simplify right side
    13,440.38x = 72,172,952.45
  5. Step 5: Solve for x
    x = 72,172,952.45/13,440.38
  6. Step 6: Final answer
    x = 5,369.86

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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.