Home / 13,279.29-19,920.15-3,418.60

Finding the Fourth Proportional to 13,279.29, 19,920.15 and 3,418.60

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Solution

The fourth proportional to 13,279.29, 19,920.15 and 3,418.60 is: 5,128.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,279.29 : 19,920.15 = 3,418.60 : x
  2. Step 2: Convert to fraction form
    13,279.29/19,920.15 = 3,418.60/x
  3. Step 3: Cross multiply
    13,279.29x = 19,920.15 × 3,418.60
  4. Step 4: Simplify right side
    13,279.29x = 68,098,908.10
  5. Step 5: Solve for x
    x = 68,098,908.10/13,279.29
  6. Step 6: Final answer
    x = 5,128.21

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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.