Home / 3,221.40-4,826.70-2,125.20

Finding the Fourth Proportional to 3,221.40, 4,826.70 and 2,125.20

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Solution

The fourth proportional to 3,221.40, 4,826.70 and 2,125.20 is: 3,184.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,221.40 : 4,826.70 = 2,125.20 : x
  2. Step 2: Convert to fraction form
    3,221.40/4,826.70 = 2,125.20/x
  3. Step 3: Cross multiply
    3,221.40x = 4,826.70 × 2,125.20
  4. Step 4: Simplify right side
    3,221.40x = 10,257,702.84
  5. Step 5: Solve for x
    x = 10,257,702.84/3,221.40
  6. Step 6: Final answer
    x = 3,184.24

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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.