Home / 13,279.06-19,919.40-3,418.66

Finding the Fourth Proportional to 13,279.06, 19,919.40 and 3,418.66

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Solution

The fourth proportional to 13,279.06, 19,919.40 and 3,418.66 is: 5,128.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,279.06 : 19,919.40 = 3,418.66 : x
  2. Step 2: Convert to fraction form
    13,279.06/19,919.40 = 3,418.66/x
  3. Step 3: Cross multiply
    13,279.06x = 19,919.40 × 3,418.66
  4. Step 4: Simplify right side
    13,279.06x = 68,097,656.00
  5. Step 5: Solve for x
    x = 68,097,656.00/13,279.06
  6. Step 6: Final answer
    x = 5,128.20

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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.