Home / 5,287.12-7,930.77-1,391.38

Finding the Fourth Proportional to 5,287.12, 7,930.77 and 1,391.38

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Solution

The fourth proportional to 5,287.12, 7,930.77 and 1,391.38 is: 2,087.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,287.12 : 7,930.77 = 1,391.38 : x
  2. Step 2: Convert to fraction form
    5,287.12/7,930.77 = 1,391.38/x
  3. Step 3: Cross multiply
    5,287.12x = 7,930.77 × 1,391.38
  4. Step 4: Simplify right side
    5,287.12x = 11,034,714.76
  5. Step 5: Solve for x
    x = 11,034,714.76/5,287.12
  6. Step 6: Final answer
    x = 2,087.09

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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.