Home / 5,142.12-7,713.52-2,021.88

Finding the Fourth Proportional to 5,142.12, 7,713.52 and 2,021.88

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Solution

The fourth proportional to 5,142.12, 7,713.52 and 2,021.88 is: 3,032.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,142.12 : 7,713.52 = 2,021.88 : x
  2. Step 2: Convert to fraction form
    5,142.12/7,713.52 = 2,021.88/x
  3. Step 3: Cross multiply
    5,142.12x = 7,713.52 × 2,021.88
  4. Step 4: Simplify right side
    5,142.12x = 15,595,811.82
  5. Step 5: Solve for x
    x = 15,595,811.82/5,142.12
  6. Step 6: Final answer
    x = 3,032.95

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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.