Home / 8,421.39-12,634.08-2,874.79

Finding the Fourth Proportional to 8,421.39, 12,634.08 and 2,874.79

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Solution

The fourth proportional to 8,421.39, 12,634.08 and 2,874.79 is: 4,312.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,421.39 : 12,634.08 = 2,874.79 : x
  2. Step 2: Convert to fraction form
    8,421.39/12,634.08 = 2,874.79/x
  3. Step 3: Cross multiply
    8,421.39x = 12,634.08 × 2,874.79
  4. Step 4: Simplify right side
    8,421.39x = 36,320,331.86
  5. Step 5: Solve for x
    x = 36,320,331.86/8,421.39
  6. Step 6: Final answer
    x = 4,312.87

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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.