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Finding the Fourth Proportional to 8,388, 12,630.92 and 6,212.16

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Solution

The fourth proportional to 8,388, 12,630.92 and 6,212.16 is: 9,354.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,388 : 12,630.92 = 6,212.16 : x
  2. Step 2: Convert to fraction form
    8,388/12,630.92 = 6,212.16/x
  3. Step 3: Cross multiply
    8,388x = 12,630.92 × 6,212.16
  4. Step 4: Simplify right side
    8,388x = 78,465,295.99
  5. Step 5: Solve for x
    x = 78,465,295.99/8,388
  6. Step 6: Final answer
    x = 9,354.47

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.