Home / 21,391.62-29,520.52-11,960.16

Finding the Fourth Proportional to 21,391.62, 29,520.52 and 11,960.16

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Solution

The fourth proportional to 21,391.62, 29,520.52 and 11,960.16 is: 16,505.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,391.62 : 29,520.52 = 11,960.16 : x
  2. Step 2: Convert to fraction form
    21,391.62/29,520.52 = 11,960.16/x
  3. Step 3: Cross multiply
    21,391.62x = 29,520.52 × 11,960.16
  4. Step 4: Simplify right side
    21,391.62x = 353,070,112.58
  5. Step 5: Solve for x
    x = 353,070,112.58/21,391.62
  6. Step 6: Final answer
    x = 16,505.07

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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.