Home / 10,279.20-14,194.80-8,198.40

Finding the Fourth Proportional to 10,279.20, 14,194.80 and 8,198.40

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Solution

The fourth proportional to 10,279.20, 14,194.80 and 8,198.40 is: 11,321.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,279.20 : 14,194.80 = 8,198.40 : x
  2. Step 2: Convert to fraction form
    10,279.20/14,194.80 = 8,198.40/x
  3. Step 3: Cross multiply
    10,279.20x = 14,194.80 × 8,198.40
  4. Step 4: Simplify right side
    10,279.20x = 116,374,648.32
  5. Step 5: Solve for x
    x = 116,374,648.32/10,279.20
  6. Step 6: Final answer
    x = 11,321.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.