Home / 3,927.45-5,419.76-2,158.95

Finding the Fourth Proportional to 3,927.45, 5,419.76 and 2,158.95

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Solution

The fourth proportional to 3,927.45, 5,419.76 and 2,158.95 is: 2,979.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,927.45 : 5,419.76 = 2,158.95 : x
  2. Step 2: Convert to fraction form
    3,927.45/5,419.76 = 2,158.95/x
  3. Step 3: Cross multiply
    3,927.45x = 5,419.76 × 2,158.95
  4. Step 4: Simplify right side
    3,927.45x = 11,700,990.85
  5. Step 5: Solve for x
    x = 11,700,990.85/3,927.45
  6. Step 6: Final answer
    x = 2,979.28

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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.