Home / 5,128.24-7,691.28-2,205.76

Finding the Fourth Proportional to 5,128.24, 7,691.28 and 2,205.76

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Solution

The fourth proportional to 5,128.24, 7,691.28 and 2,205.76 is: 3,308.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.24 : 7,691.28 = 2,205.76 : x
  2. Step 2: Convert to fraction form
    5,128.24/7,691.28 = 2,205.76/x
  3. Step 3: Cross multiply
    5,128.24x = 7,691.28 × 2,205.76
  4. Step 4: Simplify right side
    5,128.24x = 16,965,117.77
  5. Step 5: Solve for x
    x = 16,965,117.77/5,128.24
  6. Step 6: Final answer
    x = 3,308.18

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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.