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Finding the Fourth Proportional to 8,205, 12,308.94 and 3,009.72

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Solution

The fourth proportional to 8,205, 12,308.94 and 3,009.72 is: 4,515.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,205 : 12,308.94 = 3,009.72 : x
  2. Step 2: Convert to fraction form
    8,205/12,308.94 = 3,009.72/x
  3. Step 3: Cross multiply
    8,205x = 12,308.94 × 3,009.72
  4. Step 4: Simplify right side
    8,205x = 37,046,462.90
  5. Step 5: Solve for x
    x = 37,046,462.90/8,205
  6. Step 6: Final answer
    x = 4,515.11

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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.