Home / 5,409.21-8,113.88-2,123.85

Finding the Fourth Proportional to 5,409.21, 8,113.88 and 2,123.85

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Solution

The fourth proportional to 5,409.21, 8,113.88 and 2,123.85 is: 3,185.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,409.21 : 8,113.88 = 2,123.85 : x
  2. Step 2: Convert to fraction form
    5,409.21/8,113.88 = 2,123.85/x
  3. Step 3: Cross multiply
    5,409.21x = 8,113.88 × 2,123.85
  4. Step 4: Simplify right side
    5,409.21x = 17,232,669.35
  5. Step 5: Solve for x
    x = 17,232,669.35/5,409.21
  6. Step 6: Final answer
    x = 3,185.80

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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.