Home / 21,131.54-29,161.98-11,571.83

Finding the Fourth Proportional to 21,131.54, 29,161.98 and 11,571.83

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Solution

The fourth proportional to 21,131.54, 29,161.98 and 11,571.83 is: 15,969.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,131.54 : 29,161.98 = 11,571.83 : x
  2. Step 2: Convert to fraction form
    21,131.54/29,161.98 = 11,571.83/x
  3. Step 3: Cross multiply
    21,131.54x = 29,161.98 × 11,571.83
  4. Step 4: Simplify right side
    21,131.54x = 337,457,475.02
  5. Step 5: Solve for x
    x = 337,457,475.02/21,131.54
  6. Step 6: Final answer
    x = 15,969.37

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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.