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Finding the Fourth Proportional to 8,328, 12,492.72 and 2,172

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Solution

The fourth proportional to 8,328, 12,492.72 and 2,172 is: 3,258.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,328 : 12,492.72 = 2,172 : x
  2. Step 2: Convert to fraction form
    8,328/12,492.72 = 2,172/x
  3. Step 3: Cross multiply
    8,328x = 12,492.72 × 2,172
  4. Step 4: Simplify right side
    8,328x = 27,134,187.84
  5. Step 5: Solve for x
    x = 27,134,187.84/8,328
  6. Step 6: Final answer
    x = 3,258.19

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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.