Home / 7,279.80-10,920.51-2,661.72

Finding the Fourth Proportional to 7,279.80, 10,920.51 and 2,661.72

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Solution

The fourth proportional to 7,279.80, 10,920.51 and 2,661.72 is: 3,992.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,279.80 : 10,920.51 = 2,661.72 : x
  2. Step 2: Convert to fraction form
    7,279.80/10,920.51 = 2,661.72/x
  3. Step 3: Cross multiply
    7,279.80x = 10,920.51 × 2,661.72
  4. Step 4: Simplify right side
    7,279.80x = 29,067,339.88
  5. Step 5: Solve for x
    x = 29,067,339.88/7,279.80
  6. Step 6: Final answer
    x = 3,992.88

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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.