Home / 6,390.12-9,581.08-2,691.36

Finding the Fourth Proportional to 6,390.12, 9,581.08 and 2,691.36

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Solution

The fourth proportional to 6,390.12, 9,581.08 and 2,691.36 is: 4,035.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,390.12 : 9,581.08 = 2,691.36 : x
  2. Step 2: Convert to fraction form
    6,390.12/9,581.08 = 2,691.36/x
  3. Step 3: Cross multiply
    6,390.12x = 9,581.08 × 2,691.36
  4. Step 4: Simplify right side
    6,390.12x = 25,786,135.47
  5. Step 5: Solve for x
    x = 25,786,135.47/6,390.12
  6. Step 6: Final answer
    x = 4,035.31

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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.