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Finding the Fourth Proportional to 8,786.88, 13,172.40 and 3,236.40

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Solution

The fourth proportional to 8,786.88, 13,172.40 and 3,236.40 is: 4,851.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,786.88 : 13,172.40 = 3,236.40 : x
  2. Step 2: Convert to fraction form
    8,786.88/13,172.40 = 3,236.40/x
  3. Step 3: Cross multiply
    8,786.88x = 13,172.40 × 3,236.40
  4. Step 4: Simplify right side
    8,786.88x = 42,631,155.36
  5. Step 5: Solve for x
    x = 42,631,155.36/8,786.88
  6. Step 6: Final answer
    x = 4,851.68

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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.