Home / 5,639.00-7,781.70-3,120.96

Finding the Fourth Proportional to 5,639.00, 7,781.70 and 3,120.96

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Solution

The fourth proportional to 5,639.00, 7,781.70 and 3,120.96 is: 4,306.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,639.00 : 7,781.70 = 3,120.96 : x
  2. Step 2: Convert to fraction form
    5,639.00/7,781.70 = 3,120.96/x
  3. Step 3: Cross multiply
    5,639.00x = 7,781.70 × 3,120.96
  4. Step 4: Simplify right side
    5,639.00x = 24,286,358.83
  5. Step 5: Solve for x
    x = 24,286,358.83/5,639.00
  6. Step 6: Final answer
    x = 4,306.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.