Home / 5,409.20-8,123.40-4,179.60

Finding the Fourth Proportional to 5,409.20, 8,123.40 and 4,179.60

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Solution

The fourth proportional to 5,409.20, 8,123.40 and 4,179.60 is: 6,276.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,409.20 : 8,123.40 = 4,179.60 : x
  2. Step 2: Convert to fraction form
    5,409.20/8,123.40 = 4,179.60/x
  3. Step 3: Cross multiply
    5,409.20x = 8,123.40 × 4,179.60
  4. Step 4: Simplify right side
    5,409.20x = 33,952,562.64
  5. Step 5: Solve for x
    x = 33,952,562.64/5,409.20
  6. Step 6: Final answer
    x = 6,276.82

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1.5x scale

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.