Home / 7,279.76-10,917.67-3,121.73

Finding the Fourth Proportional to 7,279.76, 10,917.67 and 3,121.73

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Solution

The fourth proportional to 7,279.76, 10,917.67 and 3,121.73 is: 4,681.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,279.76 : 10,917.67 = 3,121.73 : x
  2. Step 2: Convert to fraction form
    7,279.76/10,917.67 = 3,121.73/x
  3. Step 3: Cross multiply
    7,279.76x = 10,917.67 × 3,121.73
  4. Step 4: Simplify right side
    7,279.76x = 34,082,017.97
  5. Step 5: Solve for x
    x = 34,082,017.97/7,279.76
  6. Step 6: Final answer
    x = 4,681.75

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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.