Home / 3,179.07-4,390.80-2,115

Finding the Fourth Proportional to 3,179.07, 4,390.80 and 2,115

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Solution

The fourth proportional to 3,179.07, 4,390.80 and 2,115 is: 2,921.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,179.07 : 4,390.80 = 2,115 : x
  2. Step 2: Convert to fraction form
    3,179.07/4,390.80 = 2,115/x
  3. Step 3: Cross multiply
    3,179.07x = 4,390.80 × 2,115
  4. Step 4: Simplify right side
    3,179.07x = 9,286,549.93
  5. Step 5: Solve for x
    x = 9,286,549.93/3,179.07
  6. Step 6: Final answer
    x = 2,921.15

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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.