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Finding the Fourth Proportional to 8,618.81, 12,924.15 and 3,069.92

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Solution

The fourth proportional to 8,618.81, 12,924.15 and 3,069.92 is: 4,603.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,618.81 : 12,924.15 = 3,069.92 : x
  2. Step 2: Convert to fraction form
    8,618.81/12,924.15 = 3,069.92/x
  3. Step 3: Cross multiply
    8,618.81x = 12,924.15 × 3,069.92
  4. Step 4: Simplify right side
    8,618.81x = 39,676,106.57
  5. Step 5: Solve for x
    x = 39,676,106.57/8,618.81
  6. Step 6: Final answer
    x = 4,603.43

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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.