Home / 5,129.75-7,682.20-2,931.82

Finding the Fourth Proportional to 5,129.75, 7,682.20 and 2,931.82

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Solution

The fourth proportional to 5,129.75, 7,682.20 and 2,931.82 is: 4,390.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,129.75 : 7,682.20 = 2,931.82 : x
  2. Step 2: Convert to fraction form
    5,129.75/7,682.20 = 2,931.82/x
  3. Step 3: Cross multiply
    5,129.75x = 7,682.20 × 2,931.82
  4. Step 4: Simplify right side
    5,129.75x = 22,522,801.07
  5. Step 5: Solve for x
    x = 22,522,801.07/5,129.75
  6. Step 6: Final answer
    x = 4,390.62

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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.