Home / 8,539.20-12,794.40-4,147.20

Finding the Fourth Proportional to 8,539.20, 12,794.40 and 4,147.20

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Solution

The fourth proportional to 8,539.20, 12,794.40 and 4,147.20 is: 6,213.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,539.20 : 12,794.40 = 4,147.20 : x
  2. Step 2: Convert to fraction form
    8,539.20/12,794.40 = 4,147.20/x
  3. Step 3: Cross multiply
    8,539.20x = 12,794.40 × 4,147.20
  4. Step 4: Simplify right side
    8,539.20x = 53,060,935.68
  5. Step 5: Solve for x
    x = 53,060,935.68/8,539.20
  6. Step 6: Final answer
    x = 6,213.81

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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.