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Finding the Fourth Proportional to 12,228, 16,874.76 and 6,639.12

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Solution

The fourth proportional to 12,228, 16,874.76 and 6,639.12 is: 9,162.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,228 : 16,874.76 = 6,639.12 : x
  2. Step 2: Convert to fraction form
    12,228/16,874.76 = 6,639.12/x
  3. Step 3: Cross multiply
    12,228x = 16,874.76 × 6,639.12
  4. Step 4: Simplify right side
    12,228x = 112,033,556.61
  5. Step 5: Solve for x
    x = 112,033,556.61/12,228
  6. Step 6: Final answer
    x = 9,162.05

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1.5x scale

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.