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Finding the Fourth Proportional to 19,642.92, 27,107.79 and 11,144.82

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Solution

The fourth proportional to 19,642.92, 27,107.79 and 11,144.82 is: 15,380.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,642.92 : 27,107.79 = 11,144.82 : x
  2. Step 2: Convert to fraction form
    19,642.92/27,107.79 = 11,144.82/x
  3. Step 3: Cross multiply
    19,642.92x = 27,107.79 × 11,144.82
  4. Step 4: Simplify right side
    19,642.92x = 302,111,440.15
  5. Step 5: Solve for x
    x = 302,111,440.15/19,642.92
  6. Step 6: Final answer
    x = 15,380.17

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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.