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Finding the Fourth Proportional to 7,620.00, 11,422.20 and 2,620.87

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Solution

The fourth proportional to 7,620.00, 11,422.20 and 2,620.87 is: 3,928.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,620.00 : 11,422.20 = 2,620.87 : x
  2. Step 2: Convert to fraction form
    7,620.00/11,422.20 = 2,620.87/x
  3. Step 3: Cross multiply
    7,620.00x = 11,422.20 × 2,620.87
  4. Step 4: Simplify right side
    7,620.00x = 29,936,088.21
  5. Step 5: Solve for x
    x = 29,936,088.21/7,620.00
  6. Step 6: Final answer
    x = 3,928.62

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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.