Home / 21,391.70-29,520.74-11,960.28

Finding the Fourth Proportional to 21,391.70, 29,520.74 and 11,960.28

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Solution

The fourth proportional to 21,391.70, 29,520.74 and 11,960.28 is: 16,505.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,391.70 : 29,520.74 = 11,960.28 : x
  2. Step 2: Convert to fraction form
    21,391.70/29,520.74 = 11,960.28/x
  3. Step 3: Cross multiply
    21,391.70x = 29,520.74 × 11,960.28
  4. Step 4: Simplify right side
    21,391.70x = 353,076,316.21
  5. Step 5: Solve for x
    x = 353,076,316.21/21,391.70
  6. Step 6: Final answer
    x = 16,505.29

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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.