Home / 7,122.24-9,828.96-3,979.44

Finding the Fourth Proportional to 7,122.24, 9,828.96 and 3,979.44

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Solution

The fourth proportional to 7,122.24, 9,828.96 and 3,979.44 is: 5,491.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,122.24 : 9,828.96 = 3,979.44 : x
  2. Step 2: Convert to fraction form
    7,122.24/9,828.96 = 3,979.44/x
  3. Step 3: Cross multiply
    7,122.24x = 9,828.96 × 3,979.44
  4. Step 4: Simplify right side
    7,122.24x = 39,113,756.58
  5. Step 5: Solve for x
    x = 39,113,756.58/7,122.24
  6. Step 6: Final answer
    x = 5,491.78

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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.