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Finding the Fourth Proportional to 12,228, 16,875 and 6,639.36

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Solution

The fourth proportional to 12,228, 16,875 and 6,639.36 is: 9,162.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,228 : 16,875 = 6,639.36 : x
  2. Step 2: Convert to fraction form
    12,228/16,875 = 6,639.36/x
  3. Step 3: Cross multiply
    12,228x = 16,875 × 6,639.36
  4. Step 4: Simplify right side
    12,228x = 112,039,200
  5. Step 5: Solve for x
    x = 112,039,200/12,228
  6. Step 6: Final answer
    x = 9,162.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.