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Finding the Fourth Proportional to 8,235.72, 12,354.16 and 2,688.66

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Solution

The fourth proportional to 8,235.72, 12,354.16 and 2,688.66 is: 4,033.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,235.72 : 12,354.16 = 2,688.66 : x
  2. Step 2: Convert to fraction form
    8,235.72/12,354.16 = 2,688.66/x
  3. Step 3: Cross multiply
    8,235.72x = 12,354.16 × 2,688.66
  4. Step 4: Simplify right side
    8,235.72x = 33,216,135.83
  5. Step 5: Solve for x
    x = 33,216,135.83/8,235.72
  6. Step 6: Final answer
    x = 4,033.18

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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.