Home / 21,138.92-29,105.33-17,945.60

Finding the Fourth Proportional to 21,138.92, 29,105.33 and 17,945.60

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Solution

The fourth proportional to 21,138.92, 29,105.33 and 17,945.60 is: 24,708.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,138.92 : 29,105.33 = 17,945.60 : x
  2. Step 2: Convert to fraction form
    21,138.92/29,105.33 = 17,945.60/x
  3. Step 3: Cross multiply
    21,138.92x = 29,105.33 × 17,945.60
  4. Step 4: Simplify right side
    21,138.92x = 522,312,593.08
  5. Step 5: Solve for x
    x = 522,312,593.08/21,138.92
  6. Step 6: Final answer
    x = 24,708.57

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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.