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Finding the Fourth Proportional to 11,428.97, 17,143.28 and 8,328.65

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Solution

The fourth proportional to 11,428.97, 17,143.28 and 8,328.65 is: 12,492.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,428.97 : 17,143.28 = 8,328.65 : x
  2. Step 2: Convert to fraction form
    11,428.97/17,143.28 = 8,328.65/x
  3. Step 3: Cross multiply
    11,428.97x = 17,143.28 × 8,328.65
  4. Step 4: Simplify right side
    11,428.97x = 142,780,380.19
  5. Step 5: Solve for x
    x = 142,780,380.19/11,428.97
  6. Step 6: Final answer
    x = 12,492.84

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1.5x scale

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.