Home / 8,311.55-12,463.65-3,113.78

Finding the Fourth Proportional to 8,311.55, 12,463.65 and 3,113.78

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Solution

The fourth proportional to 8,311.55, 12,463.65 and 3,113.78 is: 4,669.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,311.55 : 12,463.65 = 3,113.78 : x
  2. Step 2: Convert to fraction form
    8,311.55/12,463.65 = 3,113.78/x
  3. Step 3: Cross multiply
    8,311.55x = 12,463.65 × 3,113.78
  4. Step 4: Simplify right side
    8,311.55x = 38,809,001.78
  5. Step 5: Solve for x
    x = 38,809,001.78/8,311.55
  6. Step 6: Final answer
    x = 4,669.29

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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.