Home / 8,421.31-12,631.24-2,874.79

Finding the Fourth Proportional to 8,421.31, 12,631.24 and 2,874.79

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Solution

The fourth proportional to 8,421.31, 12,631.24 and 2,874.79 is: 4,311.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,421.31 : 12,631.24 = 2,874.79 : x
  2. Step 2: Convert to fraction form
    8,421.31/12,631.24 = 2,874.79/x
  3. Step 3: Cross multiply
    8,421.31x = 12,631.24 × 2,874.79
  4. Step 4: Simplify right side
    8,421.31x = 36,312,162.44
  5. Step 5: Solve for x
    x = 36,312,162.44/8,421.31
  6. Step 6: Final answer
    x = 4,311.94

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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.