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Finding the Fourth Proportional to 8,809.85, 13,203.43 and 3,878.21

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Solution

The fourth proportional to 8,809.85, 13,203.43 and 3,878.21 is: 5,812.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,809.85 : 13,203.43 = 3,878.21 : x
  2. Step 2: Convert to fraction form
    8,809.85/13,203.43 = 3,878.21/x
  3. Step 3: Cross multiply
    8,809.85x = 13,203.43 × 3,878.21
  4. Step 4: Simplify right side
    8,809.85x = 51,205,674.26
  5. Step 5: Solve for x
    x = 51,205,674.26/8,809.85
  6. Step 6: Final answer
    x = 5,812.32

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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.