Home / 13,279.68-18,305.82-10,917.72

Finding the Fourth Proportional to 13,279.68, 18,305.82 and 10,917.72

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Solution

The fourth proportional to 13,279.68, 18,305.82 and 10,917.72 is: 15,049.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,279.68 : 18,305.82 = 10,917.72 : x
  2. Step 2: Convert to fraction form
    13,279.68/18,305.82 = 10,917.72/x
  3. Step 3: Cross multiply
    13,279.68x = 18,305.82 × 10,917.72
  4. Step 4: Simplify right side
    13,279.68x = 199,857,817.13
  5. Step 5: Solve for x
    x = 199,857,817.13/13,279.68
  6. Step 6: Final answer
    x = 15,049.90

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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.