Home / 8,387.72-12,575.58-3,942.90

Finding the Fourth Proportional to 8,387.72, 12,575.58 and 3,942.90

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Solution

The fourth proportional to 8,387.72, 12,575.58 and 3,942.90 is: 5,911.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,387.72 : 12,575.58 = 3,942.90 : x
  2. Step 2: Convert to fraction form
    8,387.72/12,575.58 = 3,942.90/x
  3. Step 3: Cross multiply
    8,387.72x = 12,575.58 × 3,942.90
  4. Step 4: Simplify right side
    8,387.72x = 49,584,254.38
  5. Step 5: Solve for x
    x = 49,584,254.38/8,387.72
  6. Step 6: Final answer
    x = 5,911.53

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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.