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Finding the Fourth Proportional to 8,811.72, 13,052.70 and 8,713.44

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Solution

The fourth proportional to 8,811.72, 13,052.70 and 8,713.44 is: 12,907.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,811.72 : 13,052.70 = 8,713.44 : x
  2. Step 2: Convert to fraction form
    8,811.72/13,052.70 = 8,713.44/x
  3. Step 3: Cross multiply
    8,811.72x = 13,052.70 × 8,713.44
  4. Step 4: Simplify right side
    8,811.72x = 113,733,918.29
  5. Step 5: Solve for x
    x = 113,733,918.29/8,811.72
  6. Step 6: Final answer
    x = 12,907.12

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.