Home / 5,129.21-7,688.99-2,785.77

Finding the Fourth Proportional to 5,129.21, 7,688.99 and 2,785.77

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Solution

The fourth proportional to 5,129.21, 7,688.99 and 2,785.77 is: 4,176.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,129.21 : 7,688.99 = 2,785.77 : x
  2. Step 2: Convert to fraction form
    5,129.21/7,688.99 = 2,785.77/x
  3. Step 3: Cross multiply
    5,129.21x = 7,688.99 × 2,785.77
  4. Step 4: Simplify right side
    5,129.21x = 21,419,743.74
  5. Step 5: Solve for x
    x = 21,419,743.74/5,129.21
  6. Step 6: Final answer
    x = 4,176.04

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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.