Home / 5,128.92-7,691.36-2,355.08

Finding the Fourth Proportional to 5,128.92, 7,691.36 and 2,355.08

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Solution

The fourth proportional to 5,128.92, 7,691.36 and 2,355.08 is: 3,531.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.92 : 7,691.36 = 2,355.08 : x
  2. Step 2: Convert to fraction form
    5,128.92/7,691.36 = 2,355.08/x
  3. Step 3: Cross multiply
    5,128.92x = 7,691.36 × 2,355.08
  4. Step 4: Simplify right side
    5,128.92x = 18,113,717.88
  5. Step 5: Solve for x
    x = 18,113,717.88/5,128.92
  6. Step 6: Final answer
    x = 3,531.68

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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.