Home / 5,286.37-7,929.92-2,123.81

Finding the Fourth Proportional to 5,286.37, 7,929.92 and 2,123.81

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Solution

The fourth proportional to 5,286.37, 7,929.92 and 2,123.81 is: 3,185.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,286.37 : 7,929.92 = 2,123.81 : x
  2. Step 2: Convert to fraction form
    5,286.37/7,929.92 = 2,123.81/x
  3. Step 3: Cross multiply
    5,286.37x = 7,929.92 × 2,123.81
  4. Step 4: Simplify right side
    5,286.37x = 16,841,643.40
  5. Step 5: Solve for x
    x = 16,841,643.40/5,286.37
  6. Step 6: Final answer
    x = 3,185.86

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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.