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Finding the Fourth Proportional to 11,211.53, 16,828.29 and 8,554.32

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Solution

The fourth proportional to 11,211.53, 16,828.29 and 8,554.32 is: 12,839.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,211.53 : 16,828.29 = 8,554.32 : x
  2. Step 2: Convert to fraction form
    11,211.53/16,828.29 = 8,554.32/x
  3. Step 3: Cross multiply
    11,211.53x = 16,828.29 × 8,554.32
  4. Step 4: Simplify right side
    11,211.53x = 143,954,577.71
  5. Step 5: Solve for x
    x = 143,954,577.71/11,211.53
  6. Step 6: Final answer
    x = 12,839.87

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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.