Home / 5,128.80-7,695.60-2,207.88

Finding the Fourth Proportional to 5,128.80, 7,695.60 and 2,207.88

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Solution

The fourth proportional to 5,128.80, 7,695.60 and 2,207.88 is: 3,312.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.80 : 7,695.60 = 2,207.88 : x
  2. Step 2: Convert to fraction form
    5,128.80/7,695.60 = 2,207.88/x
  3. Step 3: Cross multiply
    5,128.80x = 7,695.60 × 2,207.88
  4. Step 4: Simplify right side
    5,128.80x = 16,990,961.33
  5. Step 5: Solve for x
    x = 16,990,961.33/5,128.80
  6. Step 6: Final answer
    x = 3,312.85

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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.