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Finding the Fourth Proportional to 21,683.92, 29,924.49 and 12,253.09

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Solution

The fourth proportional to 21,683.92, 29,924.49 and 12,253.09 is: 16,909.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,683.92 : 29,924.49 = 12,253.09 : x
  2. Step 2: Convert to fraction form
    21,683.92/29,924.49 = 12,253.09/x
  3. Step 3: Cross multiply
    21,683.92x = 29,924.49 × 12,253.09
  4. Step 4: Simplify right side
    21,683.92x = 366,667,469.17
  5. Step 5: Solve for x
    x = 366,667,469.17/21,683.92
  6. Step 6: Final answer
    x = 16,909.65

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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.