Home / 13,940.09-19,231.49-8,631.15

Finding the Fourth Proportional to 13,940.09, 19,231.49 and 8,631.15

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Solution

The fourth proportional to 13,940.09, 19,231.49 and 8,631.15 is: 11,907.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,940.09 : 19,231.49 = 8,631.15 : x
  2. Step 2: Convert to fraction form
    13,940.09/19,231.49 = 8,631.15/x
  3. Step 3: Cross multiply
    13,940.09x = 19,231.49 × 8,631.15
  4. Step 4: Simplify right side
    13,940.09x = 165,989,874.91
  5. Step 5: Solve for x
    x = 165,989,874.91/13,940.09
  6. Step 6: Final answer
    x = 11,907.37

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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.