Home / 21,131.42-29,161.80-11,571.71

Finding the Fourth Proportional to 21,131.42, 29,161.80 and 11,571.71

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Solution

The fourth proportional to 21,131.42, 29,161.80 and 11,571.71 is: 15,969.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,131.42 : 29,161.80 = 11,571.71 : x
  2. Step 2: Convert to fraction form
    21,131.42/29,161.80 = 11,571.71/x
  3. Step 3: Cross multiply
    21,131.42x = 29,161.80 × 11,571.71
  4. Step 4: Simplify right side
    21,131.42x = 337,451,746.87
  5. Step 5: Solve for x
    x = 337,451,746.87/21,131.42
  6. Step 6: Final answer
    x = 15,969.20

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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.