Home / 5,221.16-7,829.80-2,100.12

Finding the Fourth Proportional to 5,221.16, 7,829.80 and 2,100.12

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Solution

The fourth proportional to 5,221.16, 7,829.80 and 2,100.12 is: 3,149.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,221.16 : 7,829.80 = 2,100.12 : x
  2. Step 2: Convert to fraction form
    5,221.16/7,829.80 = 2,100.12/x
  3. Step 3: Cross multiply
    5,221.16x = 7,829.80 × 2,100.12
  4. Step 4: Simplify right side
    5,221.16x = 16,443,519.58
  5. Step 5: Solve for x
    x = 16,443,519.58/5,221.16
  6. Step 6: Final answer
    x = 3,149.40

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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.