Home / 21,101.92-29,121.36-11,669.92

Finding the Fourth Proportional to 21,101.92, 29,121.36 and 11,669.92

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Solution

The fourth proportional to 21,101.92, 29,121.36 and 11,669.92 is: 16,104.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,101.92 : 29,121.36 = 11,669.92 : x
  2. Step 2: Convert to fraction form
    21,101.92/29,121.36 = 11,669.92/x
  3. Step 3: Cross multiply
    21,101.92x = 29,121.36 × 11,669.92
  4. Step 4: Simplify right side
    21,101.92x = 339,843,941.49
  5. Step 5: Solve for x
    x = 339,843,941.49/21,101.92
  6. Step 6: Final answer
    x = 16,104.88

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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.