Home / 5,120.10-7,062.79-3,231.01

Finding the Fourth Proportional to 5,120.10, 7,062.79 and 3,231.01

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Solution

The fourth proportional to 5,120.10, 7,062.79 and 3,231.01 is: 4,456.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,120.10 : 7,062.79 = 3,231.01 : x
  2. Step 2: Convert to fraction form
    5,120.10/7,062.79 = 3,231.01/x
  3. Step 3: Cross multiply
    5,120.10x = 7,062.79 × 3,231.01
  4. Step 4: Simplify right side
    5,120.10x = 22,819,945.12
  5. Step 5: Solve for x
    x = 22,819,945.12/5,120.10
  6. Step 6: Final answer
    x = 4,456.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.