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Finding the Fourth Proportional to 8,787, 13,176.84 and 3,240.66

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Solution

The fourth proportional to 8,787, 13,176.84 and 3,240.66 is: 4,859.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,787 : 13,176.84 = 3,240.66 : x
  2. Step 2: Convert to fraction form
    8,787/13,176.84 = 3,240.66/x
  3. Step 3: Cross multiply
    8,787x = 13,176.84 × 3,240.66
  4. Step 4: Simplify right side
    8,787x = 42,701,658.31
  5. Step 5: Solve for x
    x = 42,701,658.31/8,787
  6. Step 6: Final answer
    x = 4,859.64

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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.