Home / 21,682.31-29,917.68-12,122.39

Finding the Fourth Proportional to 21,682.31, 29,917.68 and 12,122.39

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Solution

The fourth proportional to 21,682.31, 29,917.68 and 12,122.39 is: 16,726.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,682.31 : 29,917.68 = 12,122.39 : x
  2. Step 2: Convert to fraction form
    21,682.31/29,917.68 = 12,122.39/x
  3. Step 3: Cross multiply
    21,682.31x = 29,917.68 × 12,122.39
  4. Step 4: Simplify right side
    21,682.31x = 362,673,784.86
  5. Step 5: Solve for x
    x = 362,673,784.86/21,682.31
  6. Step 6: Final answer
    x = 16,726.71

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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.