Home / 5,221.22-7,821.40-3,140.09

Finding the Fourth Proportional to 5,221.22, 7,821.40 and 3,140.09

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Solution

The fourth proportional to 5,221.22, 7,821.40 and 3,140.09 is: 4,703.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,221.22 : 7,821.40 = 3,140.09 : x
  2. Step 2: Convert to fraction form
    5,221.22/7,821.40 = 3,140.09/x
  3. Step 3: Cross multiply
    5,221.22x = 7,821.40 × 3,140.09
  4. Step 4: Simplify right side
    5,221.22x = 24,559,852.97
  5. Step 5: Solve for x
    x = 24,559,852.97/5,221.22
  6. Step 6: Final answer
    x = 4,703.85

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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.