Home / 13,279.46-19,920.22-3,418.84

Finding the Fourth Proportional to 13,279.46, 19,920.22 and 3,418.84

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Solution

The fourth proportional to 13,279.46, 19,920.22 and 3,418.84 is: 5,128.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,279.46 : 19,920.22 = 3,418.84 : x
  2. Step 2: Convert to fraction form
    13,279.46/19,920.22 = 3,418.84/x
  3. Step 3: Cross multiply
    13,279.46x = 19,920.22 × 3,418.84
  4. Step 4: Simplify right side
    13,279.46x = 68,104,044.94
  5. Step 5: Solve for x
    x = 68,104,044.94/13,279.46
  6. Step 6: Final answer
    x = 5,128.53

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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.