Home / 7,479.12-10,321.29-4,121.87

Finding the Fourth Proportional to 7,479.12, 10,321.29 and 4,121.87

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Solution

The fourth proportional to 7,479.12, 10,321.29 and 4,121.87 is: 5,688.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,479.12 : 10,321.29 = 4,121.87 : x
  2. Step 2: Convert to fraction form
    7,479.12/10,321.29 = 4,121.87/x
  3. Step 3: Cross multiply
    7,479.12x = 10,321.29 × 4,121.87
  4. Step 4: Simplify right side
    7,479.12x = 42,542,964.01
  5. Step 5: Solve for x
    x = 42,542,964.01/7,479.12
  6. Step 6: Final answer
    x = 5,688.23

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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.