Home / 7,884.42-11,815.29-5,422.02

Finding the Fourth Proportional to 7,884.42, 11,815.29 and 5,422.02

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Solution

The fourth proportional to 7,884.42, 11,815.29 and 5,422.02 is: 8,125.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,884.42 : 11,815.29 = 5,422.02 : x
  2. Step 2: Convert to fraction form
    7,884.42/11,815.29 = 5,422.02/x
  3. Step 3: Cross multiply
    7,884.42x = 11,815.29 × 5,422.02
  4. Step 4: Simplify right side
    7,884.42x = 64,062,738.69
  5. Step 5: Solve for x
    x = 64,062,738.69/7,884.42
  6. Step 6: Final answer
    x = 8,125.23

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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.