Home / 8,421.36-12,631.96-2,874.64

Finding the Fourth Proportional to 8,421.36, 12,631.96 and 2,874.64

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Solution

The fourth proportional to 8,421.36, 12,631.96 and 2,874.64 is: 4,311.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,421.36 : 12,631.96 = 2,874.64 : x
  2. Step 2: Convert to fraction form
    8,421.36/12,631.96 = 2,874.64/x
  3. Step 3: Cross multiply
    8,421.36x = 12,631.96 × 2,874.64
  4. Step 4: Simplify right side
    8,421.36x = 36,312,337.49
  5. Step 5: Solve for x
    x = 36,312,337.49/8,421.36
  6. Step 6: Final answer
    x = 4,311.93

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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.