Home / 11,918.25-16,450.21-8,142.94

Finding the Fourth Proportional to 11,918.25, 16,450.21 and 8,142.94

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Solution

The fourth proportional to 11,918.25, 16,450.21 and 8,142.94 is: 11,239.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,918.25 : 16,450.21 = 8,142.94 : x
  2. Step 2: Convert to fraction form
    11,918.25/16,450.21 = 8,142.94/x
  3. Step 3: Cross multiply
    11,918.25x = 16,450.21 × 8,142.94
  4. Step 4: Simplify right side
    11,918.25x = 133,953,073.22
  5. Step 5: Solve for x
    x = 133,953,073.22/11,918.25
  6. Step 6: Final answer
    x = 11,239.32

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Double scale
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Similar ratio
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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.