Home / 5,221.10-7,829.70-2,100.05

Finding the Fourth Proportional to 5,221.10, 7,829.70 and 2,100.05

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Solution

The fourth proportional to 5,221.10, 7,829.70 and 2,100.05 is: 3,149.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,221.10 : 7,829.70 = 2,100.05 : x
  2. Step 2: Convert to fraction form
    5,221.10/7,829.70 = 2,100.05/x
  3. Step 3: Cross multiply
    5,221.10x = 7,829.70 × 2,100.05
  4. Step 4: Simplify right side
    5,221.10x = 16,442,761.49
  5. Step 5: Solve for x
    x = 16,442,761.49/5,221.10
  6. Step 6: Final answer
    x = 3,149.29

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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.