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Finding the Fourth Proportional to 8,815.84, 13,223.88 and 3,620.56

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Solution

The fourth proportional to 8,815.84, 13,223.88 and 3,620.56 is: 5,430.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,815.84 : 13,223.88 = 3,620.56 : x
  2. Step 2: Convert to fraction form
    8,815.84/13,223.88 = 3,620.56/x
  3. Step 3: Cross multiply
    8,815.84x = 13,223.88 × 3,620.56
  4. Step 4: Simplify right side
    8,815.84x = 47,877,850.97
  5. Step 5: Solve for x
    x = 47,877,850.97/8,815.84
  6. Step 6: Final answer
    x = 5,430.89

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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.