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Finding the Fourth Proportional to 11,128.50, 16,696.08 and 6,447.42

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Solution

The fourth proportional to 11,128.50, 16,696.08 and 6,447.42 is: 9,673.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,128.50 : 16,696.08 = 6,447.42 : x
  2. Step 2: Convert to fraction form
    11,128.50/16,696.08 = 6,447.42/x
  3. Step 3: Cross multiply
    11,128.50x = 16,696.08 × 6,447.42
  4. Step 4: Simplify right side
    11,128.50x = 107,646,640.11
  5. Step 5: Solve for x
    x = 107,646,640.11/11,128.50
  6. Step 6: Final answer
    x = 9,673.06

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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.