Home / 21,391.99-29,520.92-11,960.55

Finding the Fourth Proportional to 21,391.99, 29,520.92 and 11,960.55

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Solution

The fourth proportional to 21,391.99, 29,520.92 and 11,960.55 is: 16,505.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,391.99 : 29,520.92 = 11,960.55 : x
  2. Step 2: Convert to fraction form
    21,391.99/29,520.92 = 11,960.55/x
  3. Step 3: Cross multiply
    21,391.99x = 29,520.92 × 11,960.55
  4. Step 4: Simplify right side
    21,391.99x = 353,086,439.71
  5. Step 5: Solve for x
    x = 353,086,439.71/21,391.99
  6. Step 6: Final answer
    x = 16,505.54

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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.