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Finding the Fourth Proportional to 8,020.08, 12,028.40 and 3,090.40

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Solution

The fourth proportional to 8,020.08, 12,028.40 and 3,090.40 is: 4,634.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,020.08 : 12,028.40 = 3,090.40 : x
  2. Step 2: Convert to fraction form
    8,020.08/12,028.40 = 3,090.40/x
  3. Step 3: Cross multiply
    8,020.08x = 12,028.40 × 3,090.40
  4. Step 4: Simplify right side
    8,020.08x = 37,172,567.36
  5. Step 5: Solve for x
    x = 37,172,567.36/8,020.08
  6. Step 6: Final answer
    x = 4,634.94

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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.