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Finding the Fourth Proportional to 21,914.91, 30,246.36 and 21,185.91

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Solution

The fourth proportional to 21,914.91, 30,246.36 and 21,185.91 is: 29,240.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,914.91 : 30,246.36 = 21,185.91 : x
  2. Step 2: Convert to fraction form
    21,914.91/30,246.36 = 21,185.91/x
  3. Step 3: Cross multiply
    21,914.91x = 30,246.36 × 21,185.91
  4. Step 4: Simplify right side
    21,914.91x = 640,796,660.79
  5. Step 5: Solve for x
    x = 640,796,660.79/21,914.91
  6. Step 6: Final answer
    x = 29,240.21

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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.