Home / 7,319-10,979.89-2,936.80

Finding the Fourth Proportional to 7,319, 10,979.89 and 2,936.80

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Solution

The fourth proportional to 7,319, 10,979.89 and 2,936.80 is: 4,405.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,319 : 10,979.89 = 2,936.80 : x
  2. Step 2: Convert to fraction form
    7,319/10,979.89 = 2,936.80/x
  3. Step 3: Cross multiply
    7,319x = 10,979.89 × 2,936.80
  4. Step 4: Simplify right side
    7,319x = 32,245,740.95
  5. Step 5: Solve for x
    x = 32,245,740.95/7,319
  6. Step 6: Final answer
    x = 4,405.76

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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.