Home / 6,291.60-9,438.30-2,131.80

Finding the Fourth Proportional to 6,291.60, 9,438.30 and 2,131.80

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Solution

The fourth proportional to 6,291.60, 9,438.30 and 2,131.80 is: 3,198.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,291.60 : 9,438.30 = 2,131.80 : x
  2. Step 2: Convert to fraction form
    6,291.60/9,438.30 = 2,131.80/x
  3. Step 3: Cross multiply
    6,291.60x = 9,438.30 × 2,131.80
  4. Step 4: Simplify right side
    6,291.60x = 20,120,567.94
  5. Step 5: Solve for x
    x = 20,120,567.94/6,291.60
  6. Step 6: Final answer
    x = 3,198.00

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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.