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Finding the Fourth Proportional to 8,872.79, 13,309.86 and 5,175.39

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Solution

The fourth proportional to 8,872.79, 13,309.86 and 5,175.39 is: 7,763.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,872.79 : 13,309.86 = 5,175.39 : x
  2. Step 2: Convert to fraction form
    8,872.79/13,309.86 = 5,175.39/x
  3. Step 3: Cross multiply
    8,872.79x = 13,309.86 × 5,175.39
  4. Step 4: Simplify right side
    8,872.79x = 68,883,716.35
  5. Step 5: Solve for x
    x = 68,883,716.35/8,872.79
  6. Step 6: Final answer
    x = 7,763.48

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1.5x scale

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.